Malicious PDF — malware analysis report

Static analysis result for SHA-256 3518636fb9f7fd5d…

MALICIOUS

PDF

32.2 KB Created: 2020-08-23 14:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b96c638787ff1c3b8cd4ac71d1f8a3ab SHA-1: 57aab11b69a28d570a9f30b4dad5babe9a4dd797 SHA-256: 3518636fb9f7fd5d84fd7be505c08ec4adf96c3d6d080abd33c649dbf91d9d92
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a malicious redirector suggests an attempt to lure users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=gatling+gun+sound+effect
    • http://dolur.bearhugquiltworks.com/uploads/1/3/1/4/131438177/wexutuxub-lidiwep.pdf
    • http://mopafusig.sainttheresaattleboro.org/uploads/1/3/1/3/131381428/rojoruvezavipokazeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/kopidejujipa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0200/1570/files/bowmasters_mod_game.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3590/files/96875943356.pdf
    • https://cdn.shopify.com/s/files/1/0433/5730/7039/files/85248589276.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/62415171115.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/multivariate_normal_distribution_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/rozexapofoduwafizowiwifa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/34278418708.pdf
    • https://cdn.shopify.com/s/files/1/0432/0467/3699/files/arupu_song_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6572/files/asvab_mechanical_comprehension_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/sesidowibupav.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_off000042d5.bin
da5e5f03763a5680e604b0145d4eb3a1b27cef51e17c811abbea28d0223b81da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42D5 5124 bytes
font_01_sfnt_off0000545d.bin
09ba18cd542965bc297ef04c083a2e8ed94f341cf4cc6fa697f539ee213c5754		 pdf-font-stream PDF embedded font (sfnt) at offset 0x545D 9392 bytes

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