Malicious PDF — malware analysis report

Static analysis result for SHA-256 5addf0866914f31a…

MALICIOUS

PDF

47.4 KB Created: 2020-08-10 22:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d4f1d097c43b40225769b6b10f7872c SHA-1: 9272c7cf18e16922650b22922abae865974a6ec3 SHA-256: 5addf0866914f31a605a296ec17d886a1a91ccacbb856839b3211b16f2dcb904
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector at `https://ttraff.ru/pify?keyword=cantos+catolicos+acordes+pdf`. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content as a legitimate PDF. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true 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.ru/pify?keyword=cantos+catolicos+acordes+pdf
    • http://files.lo-phi.com/uploads/1/3/0/7/130740536/natubo-bakemazodetodat-pibujo-gojifu.pdf
    • http://nedibi.alpacasofaledo.com/uploads/1/3/2/6/132683071/88aa1dc7745.pdf
    • http://wevekopif.villagepottersguild.org/uploads/1/3/1/0/131070450/27a6921.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/72353618990.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/20269650208.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/36706504521.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/cambridge_english_fun_for_starters_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/77993128035.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/teoria_finalista_mitigada.pdf
    • https://cdn.shopify.com/s/files/1/0430/6727/7469/files/jinatikutegor.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/print_exception_python.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/35737519214.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/analogy_reasoning_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/iam_751_boeing_collective_bargaining_agreement.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d31.bin
c0defb40ec26f743f26732780fb9c8e73dcc99954de2de5c53aa0a0047f66c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D31 5052 bytes
font_01_sfnt_off00008e6a.bin
7d9c8e4f27e9ba8a75444f9de76569f28eed492344f2f2e64bcff6cee8f9457b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6A 10024 bytes

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