Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a42e42d8a87bc4…

MALICIOUS

PDF

43.0 KB Created: 2020-08-22 07:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1400ebea981046465f61ea662eb14125 SHA-1: ec32d176749e8127d37b72edbc785c4ac3955476 SHA-256: 50a42e42d8a87bc4e429dcebb59783ea259c1e3245620e288e4f3c8f166cbc8a
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to SEO-optimized PDF files, a common tactic for link farms and potentially malicious redirection. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=2010+cadillac+srx+4+owners+manual'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to this malicious site, likely for further exploitation or phishing.

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.cc/pify?keyword=2010+cadillac+srx+4+owners+manual
    • http://files.startcincinnati.com/uploads/1/3/1/4/131409017/716156.pdf
    • http://mafifaxa.elafusa.com/uploads/1/3/2/8/132814940/3308795.pdf
    • http://files.mpflowergarden.com/uploads/1/3/2/8/132815298/97d29c65e9.pdf
    • http://tumaker.directedapparel.com/uploads/1/3/1/6/131607600/fazasuko.pdf
    • http://vafubeb.celebraterecoverycb.com/uploads/1/3/1/0/131070571/buvajosuwurami.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1480/files/carrom_disc_pool_hack_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/sharp_aquos_40_led_tv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/59400652780.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/nasovusifimifanixakorawe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1516/6357/files/dieta_cetogenica_menu_semanal.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/french_orthography.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/3221812676.pdf
    • https://cdn.shopify.com/s/files/1/0429/5914/3068/files/92541422415.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/tivababumubem.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/zogaluxeja.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/vodewotubumodagesegikatup.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/zitegi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/79934476453.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/
    • https://cdn.shopify.com/s/files/1/0436/3078/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c13.bin
54610d6b6bd5e93e9dc95c7d38b82755c0c944f62cf55ed040e235c97fb0487f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C13 5368 bytes
font_01_sfnt_off00006e3c.bin
6d5460281c4a2bf1a889ec4dc8479a5b369bb8af6e441dcd16dae6af044d30e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 10084 bytes
font_02_sfnt_off000090bd.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90BD 4324 bytes

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