Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52b40af38fbfc01…

MALICIOUS

PDF

44.1 KB Created: 2020-08-15 06:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f14de3750603c9470a25d4faf0da9c43 SHA-1: cc62fe88bed753251413947be11b7649dadf134b SHA-256: d52b40af38fbfc0167c1090560c7b454a8d250f885a9901af6bc557c1d7e2d5a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.com/pify?keyword=data+analysis+book+free`. This indicates the document is designed to lure users to malicious sites under the guise of offering free resources.

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=data+analysis+book+free
    • http://files.donaldunger.com/uploads/1/3/1/0/131070294/fazigev.pdf
    • http://files.mesabimusicaltheater.com/uploads/1/3/1/8/131871740/ee9c2.pdf
    • http://ruruged.southtahoefootball.com/uploads/1/3/0/7/130775735/kisafanidunarive.pdf
    • http://daregot.carolgalais.com/uploads/1/3/1/8/131872225/201e3.pdf
    • http://files.shorewindbordercollies.com/uploads/1/3/1/3/131382320/90a47b.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/concord_4_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/23295269198.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/menobekazesafisubuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/best_epub_reader_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/dogofi.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/dodiniwiganawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/jemenuzatarubuxudavodufap.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/29121673151.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/fadaferup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/rajumeziludaladawobub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/national_action_plan_points.pdf
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/police_report_vs_crash_report.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061df.bin
43b0b0167b13ff3dd78e5392108635dfc72c8d2270d72dec9680d43139cd23af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DF 4856 bytes
font_01_sfnt_off00007271.bin
18cd135a8a470830ed87507161bb75c196ff43313cddc9a4e2c309ad8c1219aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 10296 bytes
font_02_sfnt_off000095ad.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95AD 4324 bytes

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