Malicious PDF — malware analysis report

Static analysis result for SHA-256 d313e56cce724d7e…

MALICIOUS

PDF

45.5 KB Created: 2020-08-01 10:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0fdd3229b6d35ad84e0a8a508b15bcba SHA-1: ca16eb09b4f2447dfa11e1a3c908f8a37d4bb452 SHA-256: d313e56cce724d7e9e36f12bdfdde9140ec07433ba060d6e6ed441b2baa9380c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. Additionally, it features a PDF link farm, suggesting an attempt to distribute or obscure malicious links. The ML classifier also strongly flagged this PDF as malicious. The document body contains a URL that appears to be the primary lure, pointing to a redirector.

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.com/pify?keyword=cod+black+ops+3+secret+achievements In PDF document text
    • http://files.lifeandjusticekcsj.org/uploads/1/3/1/4/131406841/rubit.pdfIn PDF document text
    • http://files.haciendasonoma.com/uploads/1/3/2/7/132740218/7130198.pdfIn PDF document text
    • http://files.angelachowell.com/uploads/1/3/0/7/130739519/jopifojigepa_zizopebod_wurixodas.pdfIn PDF document text
    • http://files.musicianspathtofi.com/uploads/1/3/0/7/130776023/xegurudoru_zuzixupop_rutawusapi.pdfIn PDF document text
    • http://files.dsdpdconference.com/uploads/1/3/1/4/131437669/1465908.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/1/0427/7387/2807/files/82184876781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/81564102251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4216/7194/files/p-_touch_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/nojonopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/tixopodamagovuxanevomodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8705/3475/files/53604353269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/form_3575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8684/7904/files/35451295905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/porig.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_off00007334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7334 5648 bytes
SHA-256: 3917fab2439f1a783b8b69fedef3cd982d658084a713efdfc33836ce00956750
font_01_sfnt_off0000863a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863A 10148 bytes
SHA-256: 275bb9b0a26a20f673bfb3d57c5fc267e82732a10d62ebaa22b38029de04ea9c

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