Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e8840e7b349c38…

MALICIOUS

PDF

42.9 KB Created: 2020-08-21 04:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5e5e678707ab4f26faa32f91f295fff SHA-1: d5d1e03de2ae49c296fcdb7f66795765b0779f84 SHA-256: 77e8840e7b349c3883288d9e133db974af368ee633f50b60c6de5909792db68e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a song title, which redirects to a malicious URL. This indicates a phishing or scam attempt, likely delivered as a spearphishing attachment. The document body itself is heavily obfuscated and contains numerous other PDF links, suggesting a link farm designed to obscure the primary malicious destination.

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.com/pify?keyword=apna+time+aayega+video+song++pagalworld
    • http://files.marylanddressage.org/uploads/1/3/2/6/132683334/6639078.pdf
    • http://files.estatecomputers.net/uploads/1/3/1/4/131437599/papasuvejubikeb_vediruwun.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39086675177.pdf
    • https://cdn.shopify.com/s/files/1/0431/4156/2522/files/lewipenigovenalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/ninupukem.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/60106242707.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/86890856804.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/72088299744.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/zoniselovoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/pizunozonev.pdf
    • https://cdn.shopify.com/s/files/1/0438/3100/1250/files/cambridge_preliminary_english_test_1_with_answers_2cd.pdf
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/4880869157.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/dexope.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/jufofozer.pdf
    • https://cdn.shopify.com/s/files/1/0435/8055/5419/files/21864595132.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bc7.bin
2e306af3055741dafd504da5b0eca31bd5133d03c2a2027af83a723d432ec728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC7 5308 bytes
font_01_sfnt_off00006dcf.bin
c45de9b47af8c8be3478637397276e0f46cbae00aac998d35dc365cd3f3cd871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 10140 bytes
font_02_sfnt_off00009081.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9081 4324 bytes

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