Malicious PDF — malware analysis report

Static analysis result for SHA-256 e939690a8b2264a6…

MALICIOUS

PDF

47.8 KB Created: 2020-08-19 15:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccdb2c39d9f5252f9d539ddd710b1343 SHA-1: c69852af02cf1db88526b9b1b3b74938fd5828d5 SHA-256: e939690a8b2264a6de2cc08109731db51718a04bcad42932a9ffd66c8b78cff7
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a large number of embedded links, indicating it is likely part of a link farm or SEO poisoning campaign. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=activereports+licenses+licx+%25E4%25BD%259C%25E6%2588%2590', is identified as a malicious redirector. The document body is heavily obfuscated, but the presence of this URL suggests a phishing or malware distribution attempt.

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/pify?keyword=activereports+licenses+licx+%25E4%25BD%259C%25E6%2588%2590
    • http://files.tomefrost.com/uploads/1/3/1/4/131438207/9257218.pdf
    • http://files.olympicroundup.org/uploads/1/3/1/6/131636766/rarikob.pdf
    • http://lepitufo.frontierutilitiesplans.com/uploads/1/3/0/7/130776485/5103790.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/55291216446.pdf
    • https://cdn.shopify.com/s/files/1/0431/7288/8742/files/pcsx2_save_files.pdf
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/software_engineering_books_for_bca.pdf
    • https://cdn.shopify.com/s/files/1/0430/8674/1655/files/vafeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/52193029008.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/42186197890.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1665/files/free_cisco_anyconnect_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/talujere.pdf
    • https://cdn.shopify.com/s/files/1/0431/3913/7697/files/kuvebuworujasimi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/69375835331.pdf
    • https://cdn.shopify.com/s/files/1/0434/8536/4390/files/chrysler_sebring_2010_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/chrome_extension_storage.pdf
    • https://cdn.shopify.com/s/files/1/0438/4463/2738/files/lic_jeevan_akshay_brochure.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006271.bin
83da3180982b7a21de9c3966d88ba3cce7bc280ccce6c6fd4374e0a21fc1d3c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6271 3536 bytes
font_01_sfnt_off00006ee3.bin
5ecb616b957b12613545d682127bdd0448d1c801dd274befb59dd90762c0fabe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE3 3380 bytes
font_02_sfnt_off00007ae1.bin
7586c420ad0040c0e07567ce0fd6ee5e143d9af2440dc0cf71277f0db9f9f531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE1 4832 bytes
font_03_sfnt_off00008b65.bin
54dfb18beb73a807079b0e8995029d16385ff5b372131dd7549a8a8fae1db7ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B65 10468 bytes

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