Malicious PDF — malware analysis report

Static analysis result for SHA-256 c318924af27b1286…

MALICIOUS

PDF

43.0 KB Created: 2020-08-26 04:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d86aeb46e121014b894b4d6f981d2ec SHA-1: cb2a63adadc473c3c148c821b801bf8ac7884cf8 SHA-256: c318924af27b1286254103246faf437bac40627073d0e0e2ad7a130c17cd275c
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body contains text that appears to be a lure for a book download, and the primary malicious URL is 'https://ttraff.cc/pify?keyword=the+startup+of+you+download'. This suggests a phishing or scam attempt to redirect users to malicious content.

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=the+startup+of+you+download In PDF document text
    • http://files.amwasjb.com/uploads/1/3/1/4/131483254/goxuk.pdfIn PDF document text
    • http://files.rockhollowwoods.org/uploads/1/3/1/3/131398094/jofosi.pdfIn PDF document text
    • http://kavokeb.406berners.com/uploads/1/3/1/3/131383483/jutimikadapaviruk.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/1/0437/6618/6135/files/56579210938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/spanish_dictionary_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1230/9670/files/75421924779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/33755353547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/fatasixozenu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mirogorozizodixomalejog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/81926368913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/java_comparable_interface.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5482/4598/files/list_of_syn_and_anti_addition_reactions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/mokukat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2299/9964/files/fazatep.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 2

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_off00006a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1C 5272 bytes
SHA-256: cee14ce797d2c0f9f171bf11133e8ed996cdf3c144c692fb5146e0ca0d702a7b
font_01_sfnt_off00007c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1A 10416 bytes
SHA-256: d641aa9573851ecca020466feb97aa2e171a58e29242e562ca76cf0ae92995c9

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