Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee885db45b469af…

MALICIOUS

PDF

40.2 KB Created: 2020-08-07 15:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53fcaced08a2d6dd221005c7571ab0db SHA-1: 7415610939aec20399b156ea808a4b689113f291 SHA-256: 6ee885db45b469af2c352ffa1585ba132ceaf1c888ece999dce650a159fe0965
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a technical document. The embedded link directs to 'https://ttraff.cc/pify?keyword=linear+bearing+size+chart+pdf', which is a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'linear bearing size chart pdf', likely a lure to entice users to click the malicious link.

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=linear+bearing+size+chart+pdf
    • http://rokupe.davidhunterbishop.com/uploads/1/3/1/6/131606027/vegobilimakuw.pdf
    • http://files.thecottagebaker.net/uploads/1/3/1/6/131637016/jozofalefavom_gakoxabipimaku_wonorolisud.pdf
    • http://files.tensilegroupinc.com/uploads/1/3/1/4/131438056/davonemedivome-rasizavag-ruzaraxupak.pdf
    • http://files.dunhamlit.com/uploads/1/3/0/7/130776406/7ac5199f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/84413934894.pdf
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/10935454765.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexuxedixu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6873/3078/files/denaselinetutirefifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/38853887126.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/dagamanesijep.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/58288114156.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/vubofuzizik.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/network_plus_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/38272245416.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/form_cms_1763.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/vufuvivamolawolebofid.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_off00005f40.bin
824549b369611d2956b0de99f3c8cc88584fae8d4369eb0b3b91163ef97e3667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F40 5516 bytes
font_01_sfnt_off00007206.bin
eaf49e51df089e36682a583549bba63b0792f3c191ae3c9f21db2847982376ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7206 10004 bytes

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