Malicious PDF — malware analysis report

Static analysis result for SHA-256 192c785c00de3c75…

MALICIOUS

PDF

45.5 KB Created: 2020-08-24 11:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7521f5ce946aeae1d749f56767ce593a SHA-1: 28da3bd426d2dde65d35fe28a78ba1f3af84282b SHA-256: 192c785c00de3c75d3a46410cf3afbd09ff50ba105f507f87e8484da1041d767
162 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external PDF files, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The document body also contains urgency language, further supporting a malicious intent to lure the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=ayushi+computer.+org+online+form
    • http://tewaparob.elliotcoxracing.com/uploads/1/3/2/8/132815176/ximaja.pdf
    • http://nawonew.a-1autoinc.com/uploads/1/3/1/4/131453724/sozavosijun-gizamugano-xaxusufuzevi.pdf
    • http://pegegufer.collegesite.com/uploads/1/3/1/4/131406821/mafutuwot-xuvonepek-witiv-denomanogopeso.pdf
    • http://zodowejof.etgmin.org/uploads/1/3/0/7/130776644/3948352.pdf
    • http://files.omnibus-climb4charity.org/uploads/1/3/1/3/131382274/riduwonake-marulogito.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/felilafadojixoxe.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/49065112245.pdf
    • https://cdn.shopify.com/s/files/1/0431/1128/4893/files/tuwegetavot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/mesaxoluzakoluleriwulewuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/ulisse_aldrovandi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/66332854962.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/52724331237.pdf
    • https://cdn.shopify.com/s/files/1/0462/4003/9063/files/buzojenelenulasijorese.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0434/7743/4525/files/catlogo_da_hinode_em_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/86052902268.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000669b.bin
8ce8f19b47f5e4871f940efa54427005a7b7ece3b9294f6a6ad182ef1bc6e605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669B 5224 bytes
font_01_sfnt_off0000784b.bin
af076b5b1f6e23797e66ace7737aa1abe183dcc0a8d4f651af7791e22b21c8c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 10180 bytes
font_02_sfnt_off00009af4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF4 4324 bytes

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