Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5cb1e0059e9626…

MALICIOUS

PDF

34.1 KB Created: 2020-08-11 16:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f39cb1dcdbcd10a2be6aaf8830c7f6aa SHA-1: b56c6e1601bd4fd1d4cea71c67974be5d01dc0ba SHA-256: df5cb1e0059e96263afc53639c803afaa8d157260fd402e94c2551e4042a38ab
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic indicates these links point to a known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=atmega168pa+datasheet+pdf'. Another critical heuristic identified a PDF link farm, with many links pointing to external PDFs hosted on domains like cdn.shopify.com and other less reputable hosts. The document body contains garbled text but also includes the malicious redirector URL and several other PDF URLs, reinforcing the link farm and redirection findings.

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=atmega168pa+datasheet+pdf In PDF document text
    • http://kodupu.neiljohannsenart.com/uploads/1/3/0/7/130740025/kezixukipewi.pdfIn PDF document text
    • http://files.aquestforhealthandpeace.com/uploads/1/3/2/6/132682802/5192513.pdfIn PDF document text
    • http://kijuz.sayezz.com/uploads/1/3/2/7/132741099/tifubotokixewisux.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/1/0437/0530/3190/files/ballade_1_chopin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4883/6004/files/30296777239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/tenidasifolisitesar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/aol_login_email.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/8776911202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2261/3655/files/86461843548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/undrip_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1080/8216/files/lifezebof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/12358144473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/fepezupuxapedivul.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 6

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_off000046b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46B9 5716 bytes
SHA-256: b14156583a8a7e15f8fd47cd876c2b04e861b56d0d96c587bee94df0df19ef82
font_01_sfnt_off00005a11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A11 9832 bytes
SHA-256: 78a1b50b59c7756241d1fa064fc5e94e89c1d4652b2c79b390810698e1c966d1

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