Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d542d269ac36f7…

MALICIOUS

PDF

53.1 KB Created: 2020-08-08 22:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 447388f514f14ba061736260c8969315 SHA-1: 39d712c543aa902c6a1d025278628ab47c7bed11 SHA-256: 00d542d269ac36f753019ec45c9f6d1e5909646e9b1601fcad8f9311d013899b
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector, which is likely part of a phishing or malware distribution scheme.

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=architecture+books+for+students+pdf
    • http://files.yourbirth.com/uploads/1/3/0/7/130775987/50ae8875e85.pdf
    • http://files.ayeeprettyblack.com/uploads/1/3/1/1/131164424/cbefe42e4c2d.pdf
    • http://files.harshnadinternational.com/uploads/1/3/1/3/131379904/f1d52814c29b97.pdf
    • http://files.shopcedarcreekgallery.com/uploads/1/3/1/4/131453370/775707.pdf
    • http://files.coffeejon.biz/uploads/1/3/1/0/131069789/35abca7971.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/samodipuzexirizukixoxun.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/seguputizituzesujomurox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/fozuresa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/cat_face_emoticon.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/pofekenidem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/pebujejofabawevilu.pdf
    • https://cdn.shopify.com/s/files/1/0448/0699/6134/files/kesajalafil.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0298/files/john_grisham_camino_island.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/dieta_astringente_para_nios_con_diarrea.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/systems_understanding_aid_9th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/genedevinenip.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/donald_barthelme_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/accuweather_arlington_va.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_off00009188.bin
6f2aa6d7b2be6cde1eb531684351f327d9bcf52ae02d88c10b5897a8db5c7097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9188 5192 bytes
font_01_sfnt_off0000a32f.bin
49ee52e503d0ef412f4ce55418f7a1ecd0f2cb0b635dbf76acd27d898dd63b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA32F 10420 bytes

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