Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe2afafa2bb53af…

MALICIOUS

PDF

61.9 KB Created: 2020-08-30 19:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df3dfaff5c1e179e9463d4531258ff6f SHA-1: 65a2492774df057f68eaf42284ecb6b6e2f462db SHA-256: 8fe2afafa2bb53af2105fc0e5850712429e3762c47d8c877e3ce819d39792549
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though partially corrupted, contains text related to a song download and a URL that matches the redirector link. This suggests the primary intent is to trick users into visiting malicious sites under the guise of downloading media.

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.ru/wix?keyword=mera+tu+hi+bas+yaara+mp3+song+downlo
    • https://static.usrfiles.com/ugd/b8c837_07840ca1bf734c56adf1ec0a5d14d843.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2e5d2036c146418585a26300aef531.pdf
    • https://static.usrfiles.com/ugd/87b9a8_724ceb43ea534671bf2f56182086a517.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae6b6a3abb8f4e8797b7cd5b917673a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_afd93b34cf5044dc8fdf7ef74441fcd7.pdf
    • https://cdn.shopify.com/s/files/1/0434/5154/7800/files/japaxegutazelabofoxekik.pdf
    • https://cdn.shopify.com/s/files/1/0462/5255/6437/files/zumiwiluxawizabixi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/soxajig.pdf
    • https://cdn.shopify.com/s/files/1/0429/1562/7175/files/48576439152.pdf
    • https://cdn.shopify.com/s/files/1/0435/3094/4671/files/shenmue_1_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/35286844425.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0849/files/credit_report_sites.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/reconstructing_native_american_population_history.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_off000063fc.bin
869ed6c2da902f83716559d387c0e786666db48962b75c9314ae814047b458c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FC 5760 bytes
font_01_sfnt_off00007777.bin
0460e4b819836684ee646564f23d3767bfcf5407a742f126e14b557faf704447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 5852 bytes
font_02_sfnt_off0000862e.bin
7ccf80b55cb78dd4b2349e3740ad5a1f353b24695f31e0a506cbf51ba2b09e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x862E 10668 bytes
font_03_sfnt_off0000aad8.bin
a534b91c4ec3d8756e3a834051570443c69e75f38d6508a28567570861ffac3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD8 16080 bytes
font_04_sfnt_off0000bf7d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7D 4324 bytes
font_05_sfnt_off0000cd7e.bin
477f94081942736771b1430f84033aa74c4c70ea3d7914966b7cbd461d3132fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7E 7348 bytes

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