Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9197f489ccc022…

MALICIOUS

PDF

57.8 KB Created: 2020-08-06 04:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6536cebf43cc3d9a34e2cf23952bd67a SHA-1: e9dd9df0fe8e3c493bc0df9e16c9ed8a60126e86 SHA-256: 7b9197f489ccc022fce9e8a7a58856111dc33dc1b8cfc427cc0351f12741a44c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains the URL and text suggesting it is a diagnostic definition PDF, likely a lure. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content.

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=diagnostico+educativo+definicion+pdf
    • http://files.cascadiannomads.com/uploads/1/3/0/7/130776416/rudegazu.pdf
    • http://files.strichardschichester.co.uk/uploads/1/3/1/1/131164033/7622363.pdf
    • http://files.harrisburghigh.org/uploads/1/3/1/3/131379371/d7ff44.pdf
    • http://files.rubyrosecowgirlclothes.com/uploads/1/3/1/3/131383727/morixubesoge_vezebizenuzufi_kilafepu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/1341554399.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/xazepofexe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/austerity_measures_the_new_greek_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/72755515256.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/iyanla_vanzant_books.pdf
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/afrikaans_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/79842662651.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/casual_vacancy_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/namijukutomesatenokepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/80670731836.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/makutipamelelebekotopufex.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_off000093f4.bin
b709fd7a6eb67fe82f22027d980b9f030f89b825e7bc24824b3b8ec88352392f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93F4 5136 bytes
font_01_sfnt_off0000a58c.bin
f026527104202f05dbc98b9848052481a67ceddec460eba5ee853672708c4609		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA58C 11448 bytes
font_02_sfnt_off0000c9f3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F3 4324 bytes

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