Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc44a393a69b574f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-11 22:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73b4870617b3dc62509d8d837102d48f SHA-1: d4b9643045bb1848e231f163fb3f0c40118d7628 SHA-256: fc44a393a69b574f1839bcbc618666297c4ab6a2ff7be123962bfcbdb9f8ce33
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a 'mathematical lexicon' lure. The primary malicious URL identified is ttraff.ru, which is used to redirect to a PDF hosted on Shopify. This suggests a phishing or social engineering attack aiming to redirect users to malicious content.

Heuristics 3

  • 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.
  • 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=lexique+math%25C3%25A9matique+anglais+fran%25C3%25A7ais+pdf
    • http://files.lidgettandbeyond.org/uploads/1/3/2/3/132303093/vugibif.pdf
    • http://fusesuler.swimuk.co.uk/uploads/1/3/0/7/130776031/biwoxekuwinup.pdf
    • http://files.osacps.org/uploads/1/3/0/8/130873941/d7a4096.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/fiwetojivodogutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/31115988828.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/jokerigopanufi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9515/3058/files/puzosidakibedowatakudir.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3884/files/20161473755.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/23897425784.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/84089695791.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/serepasemafudofusuripe.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/53243376676.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645d.bin
64da586ba713c3d5464f2a22d275f9d0b104d9582e51ebbd1bfd1f0f5e917fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645D 5916 bytes
font_01_sfnt_off00007815.bin
a3835fccba775829a607cae797d953636a27192ce749b1a1801f91d428c2078a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7815 16820 bytes

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