Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e075faf97674285…

MALICIOUS

PDF

43.3 KB Created: 2020-08-24 16:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 366f2655029dccd49cf73340a554ab3c SHA-1: 302409120814b1dbb2ada76cf92d5988edebafa3 SHA-256: 6e075faf97674285b33f8eb4df0f949dad76b00016a52bd445b36123d98aedfd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One of the primary links redirects to a known malicious infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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=abstract+algebra+dummit+answers
    • http://topiwoziz.kikiskreationsca.com/uploads/1/3/1/0/131070786/999516f1cb9.pdf
    • http://files.onehumanfamily.org/uploads/1/3/0/8/130814208/fexuwizab.pdf
    • http://files.thetailgatist.com/uploads/1/3/2/6/132695633/jamigagiviwepe-savinizuduzij.pdf
    • http://files.mikevincentphotography.net/uploads/1/3/1/1/131164027/pubiberuwuwot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/interview_questions_on_cloud_computing.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/63484943160.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/murabelim.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/vijuzagu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/robubuxinam.pdf
    • https://cdn.shopify.com/s/files/1/0432/7086/5052/files/46073855998.pdf
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/infrared_spectroscopy_absorption_table.pdf
    • https://cdn.shopify.com/s/files/1/0459/2366/4039/files/lifakaduluga.pdf
    • https://cdn.shopify.com/s/files/1/0429/5108/2143/files/57795604801.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/61097810062.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/private_hottie_nyc.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_off00005d22.bin
41bee49e099daf6c9ae28c5ca6f022ecfceef2040d50a6d5f2141336219a222a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 5480 bytes
font_01_sfnt_off00006fae.bin
9a5a79610e5431938937878ed9ff8e84e0a227018620b58af0854a08fb3601a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 14928 bytes