Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6d51fc4d537482…

MALICIOUS

PDF

93.0 KB Created: 2020-08-04 11:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ba397bd4f444d43ec35dc3bda12d1ec SHA-1: 1c5c19ee68772c1ea13d8aed84273bb0dee281c3 SHA-256: 5a6d51fc4d5374820bb2f1fe9df29ed3ed2eb1c0568c2f82ed73ad499e76b074
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirection and link farming, specifically pointing to the URL https://ttraff.ru/pify?keyword=barakhadi+in+english+chart+filetype+pdf. The document body, though heavily obfuscated, contains this URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded links and the nature of the redirector suggest an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

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=barakhadi+in+english+chart+filetype+pdf In PDF document text
    • http://files.sawdustsistersbirdhouses.com/uploads/1/3/1/3/131383255/6e8a76.pdfIn PDF document text
    • http://files.totallysocialasd.com/uploads/1/3/0/9/130969265/zijafusolud-bijaloxizidomaz.pdfIn PDF document text
    • http://files.masdo.org/uploads/1/3/2/8/132815123/mafokis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/bulodesebikojikexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/pepopakawezokibadojod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/kodoloka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/69901713801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/41474724824.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4685/5078/files/41389007020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/lapokawir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/xivalekelowalolateliwunat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/50814474833.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0A 5308 bytes
SHA-256: f0b14c9c474193f64e1b36abf0e1fc614370935cd4b50ca45cc7ab6fc1a24199
font_01_sfnt_off00010e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E14 15228 bytes
SHA-256: f4823840a7f89044eeeef13bbfcf8279be711b471c16c4a3b156c593f430bdc1
font_02_sfnt_off00013e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E23 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
font_03_sfnt_off00014c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C23 7116 bytes
SHA-256: b3e1c9053ffff8c5d1a12f193dd7920c10d2ba0dfa0225f26b73768d94113bfb