Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a38d8cfe09d17f…

MALICIOUS

PDF

37.5 KB Created: 2020-08-10 19:07:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d4e76f1ea4fa8384baf74a21d821a75 SHA-1: 4c786b8ce259ce6814e09986ca385abb4e89946a SHA-256: 83a38d8cfe09d17f7d32542bb50207961ced6d027c968d2cf9adb38fc4d18b96
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure designed for SEO spam and phishing. The primary malicious link, 'https://ttraff.ru/pify?keyword=physics+formulas+pdf+free+download', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content as a legitimate download. The ML classifier strongly supports the malicious verdict.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=physics+formulas+pdf+free+download In PDF document text
    • http://mogexaj.wss1sgradeib.com/uploads/1/3/2/6/132695569/ccac16093.pdfIn PDF document text
    • http://rezote.cswithwhitlock.com/uploads/1/3/1/4/131407005/divakepokelejeginofu.pdfIn PDF document text
    • http://files.thomfogartypresents.com/uploads/1/3/0/8/130874197/dixolikapuwori-vakirarobisoso.pdfIn PDF document text
    • http://files.professionalpolishingtouch.com/uploads/1/3/1/1/131164002/soroj.pdfIn PDF document text
    • http://files.csnoss.org/uploads/1/3/1/3/131379553/lejamabaloladuxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/iphone_x_screenshot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/domino_s_pizza_menu_ireland.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/2735232968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5280/0920/files/wupupilumos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/40182839684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/wijirudixuzogul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/41384059851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1797/files/nba_max_contract_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7578/1276/files/9714309184.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/dewebesixar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3915/1512/files/dalewawam.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AF 5592 bytes
SHA-256: ca447d7ed8291f6e26fe74e8a8a545911a7214bf89d4ec8e2297b141e0e4371c
font_01_sfnt_off00006793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6793 9908 bytes
SHA-256: f8e68cde49acbfa3e6f298f13cb2b694a31fa9a0edd24c3e2e37ba9bddbcb972

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