Malicious PDF — malware analysis report

Static analysis result for SHA-256 c611356304b04640…

MALICIOUS

PDF

45.8 KB Created: 2020-08-18 21:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91569367de7357b8907b964c2804e126 SHA-1: 69ed196ff318c22bba3a154068fc68452d752ada SHA-256: c611356304b04640c485a0b7ce65e379cfc8d8b867a7f97de1b517153d76fa2f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though partially corrupted, also contains this URL and a reference to 'Top 10 android apps for productivity', suggesting a lure. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO-based distribution effort. The primary malicious IOC is the redirector URL.

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.cc/pify?keyword=top+10+android+apps+for+productivity In PDF document text
    • http://files.dvrealworldlearning.com/uploads/1/3/0/7/130776033/vebozotugazuzimofed.pdfIn PDF document text
    • http://niwotape.commonmissionwomen.com/uploads/1/3/0/7/130739656/wasaxoxopusadaguk.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/1/0449/7191/7471/files/asean_regional_forum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/algebra_2_practice_and_problem_solving_workbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/vevewesimaroboretavujegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/50558461157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/anaphylaxis_pathophysiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4196/3683/files/botatenudunavimaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/91467228777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/xigupukavunux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/5125613826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/31349067969.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 3

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_off000073ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 5420 bytes
SHA-256: ea599444f85b5757f17ebe819cf67486d7246f38bf2c4644a07350f91806bfd3
font_01_sfnt_off00008670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8670 10532 bytes
SHA-256: 4c6996af088472744c894657365d67be8d061bcd5e7a8c56039404992d409122

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