Malicious PDF — malware analysis report

Static analysis result for SHA-256 23439a46115de313…

MALICIOUS

PDF

90.5 KB Created: 2020-08-18 20:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29eb00acf2cf368017fb4733e1573322 SHA-1: 2d0aee6054657e567f051a8f4f0f811e4e86e2c6 SHA-256: 23439a46115de313ec4285a69a5c69d0e7f2d3be251b3300402faeb77bef510f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the string 'Enchanted 2007 subtitles' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, which are likely part of a link farm to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=enchanted+2007+subtitles
    • http://files.northviewbandboosters.net/uploads/1/3/1/4/131408798/2164284.pdf
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/algebra_math_minutes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5720/8731/files/puzelibobisezomomeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/8612/7009/files/hp_officejet_6500_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/91067625394.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/62427873840.pdf
    • https://cdn.shopify.com/s/files/1/0437/1700/1368/files/allamanda_cathartica.pdf
    • https://cdn.shopify.com/s/files/1/0432/9111/5678/files/assemblage_bois_charpente.pdf
    • https://cdn.shopify.com/s/files/1/0434/9139/3702/files/ielts_speaking_topics_2019_with_sample_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/fikotazodomulorewudovo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/actual_ielts_speaking_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/fafoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/79316040009.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 15

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off0001282c.bin
ad63db25de4e7b269b2592bcd7525a98b526d2d753116db3c13cee84e8d0d93e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1282C 18892 bytes
font_00_sfnt_off00005272.bin
b6d8f72b59c47e884b0b6746a25c5cbd96eb494928042fd8f7d2b0ad088f297a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5272 7916 bytes
font_01_sfnt_off000066d1.bin
a849b76f9363f6e208a6b3b97826a54f7c8e554eb642b232eb64e54d4f8be3d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D1 4032 bytes
font_02_sfnt_off00007542.bin
ae959bc0e1762fd3f0466c10c61e0831ed3aafd5c3a57b2148def8a6b99962d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7542 5384 bytes
font_03_sfnt_off00008782.bin
1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8782 2656 bytes
font_04_sfnt_off00009287.bin
b7882c459d94d9fb05ee491b72d0ee9c35e8d4bc9ed5787c7a0b3ba78fd6bc86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9287 4140 bytes
font_05_sfnt_off00009fa5.bin
e23308bb06bff427f4fe2d795198e016b2e9db23d45fd702446b15ef1a1323d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA5 3048 bytes
font_06_sfnt_off0000abb1.bin
6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABB1 2328 bytes
font_07_sfnt_off0000b669.bin
d4cda5a9ecb2558448f754249352cd4d73a8f7efff03060ee9a54ebf713292d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB669 2604 bytes
font_08_sfnt_off0000c141.bin
869700f7b438b0b0f23cfbf3a170597ae1a6b01e9ba9f60fe7298d5eefb98f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC141 3840 bytes
font_09_sfnt_off0000cf4f.bin
b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4F 2108 bytes
font_10_sfnt_off0000d928.bin
87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD928 4336 bytes
font_11_sfnt_off0000e6c8.bin
0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 6148 bytes
font_12_sfnt_off0000f6b2.bin
ed44f638e0751a3fc126764fa11aa08b1682c9902795b1d096d159d4f64ff535		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 15968 bytes
font_14_sfnt_off00014788.bin
1cc80836e0a54a2c4db1185994f1ac0eab94f7f28d8d60f500043b8ef5b5dd0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14788 3536 bytes

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