Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70c4f7433bc910f…

MALICIOUS

PDF

46.8 KB Created: 2020-08-07 21:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c26a50ce2d4fc9db8e3fbe933a9d370 SHA-1: 3c1a283eb09653ae9973bd826cc64aaf42740d35 SHA-256: a70c4f7433bc910f4ff6776ee981e0fd7694aab169e5ee41ed847d415dd4e955
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary URL identified is a redirector service that appears to be used to obscure the final destination. The document body, though partially corrupted, contains text related to 'hipertrofia de adenoides en niños pdf', suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm tactic.

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.cc/pify?keyword=hipertrofia+de+adenoides+en+ni%25C3%25B1os+pdf
    • http://files.fixyourmess.com/uploads/1/3/1/3/131378993/ferefegalemoxu-xelewovixawad.pdf
    • http://files.jocelynphotoblogs.co.uk/uploads/1/3/1/8/131856945/14678f7e0.pdf
    • http://files.metrolandrealtyph.com/uploads/1/3/1/4/131437983/469b2c.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/warelapifigomif.pdf
    • https://cdn.shopify.com/s/files/1/0440/6735/6824/files/95227265353.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/xipasiwunibomaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/biotecnologa_manual_de_microbiologa_industrial.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/rulotezusiji.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/4620744821.pdf
    • https://cdn.shopify.com/s/files/1/0445/5032/4388/files/paper_bow_tie_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/simevenalunixesasosorapaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/49981213664.pdf
    • https://cdn.shopify.com/s/files/1/0440/1646/8133/files/95344217639.pdf
    • https://cdn.shopify.com/s/files/1/0431/8694/6212/files/75647829676.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a5.bin
8a0db5c748bcba64a058a15cd3e2f55d2690c5252c5a4a40ded26f463a15b4be
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 4964 bytes
font_01_sfnt_off0000793e.bin
d0bf4232d8f2622eb6b7770cabc36b9ad8e85ce102068f57fc25ca13b791c7a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x793E 11344 bytes
font_02_sfnt_off00009e11.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E11 4324 bytes