Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df9ce800547c962…

MALICIOUS

PDF

37.2 KB Created: 2020-08-15 20:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64c1d08437850605a0b01db9c9e9d217 SHA-1: c07a5e62fdce1a5073e9b24d351a2a327516f2ac SHA-256: 6df9ce800547c962eedf7f704bd64132e34d067a9ff64df3095ca63ea8609eab
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector service, which is a common tactic for phishing and malware distribution. The document body text, though partially corrupted, includes the same search query as the malicious link, suggesting a lure. The presence of numerous other links to PDF files hosted on Shopify, while some are benign, contributes to the overall impression of a link farm used for SEO manipulation or traffic generation, potentially masking the malicious intent of the primary redirector 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=best+paid+vpn+for+android+2018
    • http://defise.holyspiritfarmhorsesanctuary.com/uploads/1/3/1/1/131164462/f2927bf4.pdf
    • http://files.rmc4baseball.com/uploads/1/3/2/7/132740267/08e4e40ff7.pdf
    • http://gejumif.zhuyuejia.com/uploads/1/3/0/8/130814328/gedanevitew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/goxumefob.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/arabidopsis_thaliana_as_model_organism.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/bivariate_frequency_distribution_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/15613047942.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/ejercicios_adjetivos_demostrativos_en_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/7287/0807/files/52121064773.pdf
    • https://cdn.shopify.com/s/files/1/0432/6653/9673/files/fusionner_deux_en_une_page.pdf
    • https://cdn.shopify.com/s/files/1/0432/0899/9074/files/45017868024.pdf
    • https://cdn.shopify.com/s/files/1/0435/9575/9779/files/breach_of_trust.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/25908270490.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9098/files/mawemefelorowuniwiripe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3089/files/nomalugijub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4397/0463/files/66338907934.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_off0000535c.bin
8570ae0108092c05739b464443a8fde9c71fe6dd4dea398ef6f3bfb49152e070		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535C 5632 bytes
font_01_sfnt_off00006694.bin
fed012bd9b515033c585cc8d8d83e00147ea583e01082f71b141c268d1366ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 9804 bytes

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