Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f79fb63217c2c52…

MALICIOUS

PDF

62.0 KB Created: 2020-08-22 11:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddd22ffa4fadcf417c0aed1d0b20176f SHA-1: a790de0d9bda946d51eeb3108899e92574765c2e SHA-256: 9f79fb63217c2c521933d9884fbedf5a083923b6da64b49467b0371e27118ac2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains references to a movie song and the URL https://ttraff.cc/pify?keyword=agent+vinod+movie+song++bestwap, suggesting a lure to entice users to click on malicious links. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=agent+vinod+movie+song++bestwap
    • http://files.whistlingwingshrc.com/uploads/1/3/0/7/130775021/jidivafipe.pdf
    • http://girivu.yabraff.com/uploads/1/3/1/6/131606457/tejazujimot.pdf
    • http://maravifo.sassyarabia.com/uploads/1/3/0/8/130874426/2567911.pdf
    • http://files.carreis.li/uploads/1/3/0/7/130776402/8404074.pdf
    • http://miwuvolik.emmett-technique.us/uploads/1/3/0/8/130813780/7b024596d2925a9.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/14265728486.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/zerim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6584/3620/files/list_of_bc_caste_in_tamilnadu_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0445/5848/3620/files/gagobolufuzukanawip.pdf
    • https://cdn.shopify.com/s/files/1/0437/4387/1127/files/51394112338.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/14827515748.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9759/files/kenmore_self_cleaning_oven.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/types_of_smart_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0440/8908/2006/files/en_la_ardiente_oscuridad_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0432/8544/6824/files/30616996307.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069b7.bin
06cfba25345a72fc0f3d74e84d3e21d362462063d68590764f9f5e37a1142a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B7 5432 bytes
font_01_sfnt_off00007c30.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C30 3720 bytes
font_02_sfnt_off0000878a.bin
c4b9cd217d18c0f12c1e184bd90f256ab7acd0d10947addf19cca41ee64f6eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878A 8984 bytes
font_03_sfnt_off00009ad6.bin
2c3289ff65cd3f161b6799dd1745292eed20c8c71eab9081fcbf9b231fa06c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AD6 11336 bytes
font_04_sfnt_off0000c199.bin
48cacea5d0cd852c56eec09732fb4382483aadabbc8e677fb168c3a5b0e13b28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC199 16576 bytes
font_05_sfnt_off0000d877.bin
f9f7b14a0dd522fdd227092c25ec8a4a2fae5fda848195ea122e9f4648cc746f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD877 4472 bytes

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