Malicious PDF — malware analysis report

Static analysis result for SHA-256 084ab6a8e60dfed2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 01:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a47f864c4048c401d5ffa75fe4974c3a SHA-1: c47a707fa85cb950d8ecdccc5f191dd4d2717b8e SHA-256: 084ab6a8e60dfed2ef1be73e50e908897383efda5016c9388f37030b8958a605
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=certyfikaty+inwestycyjne+pdf'. The document body, though partially garbled, also contains this URL, suggesting a lure to external malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, many of which point to benign Shopify URLs, likely as a camouflage or to inflate search engine rankings for 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.com/pify?keyword=certyfikaty+inwestycyjne+pdf
    • http://files.lkradio.online/uploads/1/3/1/6/131636903/tamog.pdf
    • http://jewad.shopivybloom.com/uploads/1/3/2/6/132682076/tenulokipesoxi.pdf
    • http://files.lily-sage.com/uploads/1/3/0/8/130814254/pakixezowuwik.pdf
    • http://nexarafu.rockyjohnsonlaw.com/uploads/1/3/1/4/131453850/b1d5764a.pdf
    • http://vabipij.portugal-spainmarinesurveys.com/uploads/1/3/2/8/132814930/rejijigafulaletojuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/jogigudixazudakujanevoruv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4853/files/30345852716.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0490/files/babovatebexalul.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/55205008446.pdf
    • https://cdn.shopify.com/s/files/1/0434/1350/4150/files/66661983727.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/narrative_paragraph_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/fapojoxox.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/shawn_michaels_theme_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/lutoveza.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/vibiwufaxebibufeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/gijipoxirafijigaregu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0802/files/64627103740.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_off00006b7b.bin
b219ace0af2a9bfd7575e34a021f01278a43e3a9fefdc3f40e7fd931e1d7c612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7B 5356 bytes
font_01_sfnt_off00007dda.bin
fd041b30bf1508fe7d765fe074454976f89a387e0d1d33eadeeca3ad1e3bf040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDA 11680 bytes

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