Malicious PDF — malware analysis report

Static analysis result for SHA-256 1665115a325520ac…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 23:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b12521f089bd508ccefacbcd079d57f8 SHA-1: b01b5685f38ca1599b99aa49d59a348a003e85bc SHA-256: 1665115a325520ac6b7231969d712c7d2bc327c40f6dbf3218c39f413f9286b6
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL, https://ttraff.com/pify?keyword=asterisknow+configuration+guide+pdf, which is flagged as malicious. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution. The presence of numerous Shopify-hosted PDF links, while individually benign, contributes to a link farm SEO tactic, further indicating malicious intent.

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=asterisknow+configuration+guide+pdf
    • http://files.sentinelhealthshield.com/uploads/1/3/0/8/130813528/pemerokemomodofu.pdf
    • http://xezifuxi.nicolenaro.org/uploads/1/3/1/4/131437987/526d99109.pdf
    • http://files.citylimitswestern.com/uploads/1/3/1/0/131070539/sabupuke.pdf
    • http://files.prestamoscreditoetc.com/uploads/1/3/0/7/130740442/11be9a0a2a32e.pdf
    • http://files.mojofinancialservices.com/uploads/1/3/0/7/130739340/1180215.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/63287627191.pdf
    • https://cdn.shopify.com/s/files/1/0437/7339/5106/files/eye_glare_meme.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/misupaguzibowu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/65439774558.pdf
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/fasuxorijuzupokovevazewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/84562978724.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/2025727977.pdf
    • https://cdn.shopify.com/s/files/1/0439/4686/8891/files/jaludipetolejikadefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/jspdf_autotable_rowspan.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/98204411980.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/0277/3156/files/tamonewuzelemazivu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/6892569013.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/temikanugotadarimoxomeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/entrepreneurship_development_book_by_rajeev_roy.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_off00006ebc.bin
5c56d34d82a5123f5b9ae59380b40b07c37dc8d0392dc4659ae371b916070f8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 5436 bytes
font_01_sfnt_off0000816d.bin
75d527a0c9b99454f55919e8567b0b1821c781f682d677bea62b0f78a8952e89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816D 10712 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.