Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75c01bc8a4a3b04…

MALICIOUS

PDF

58.5 KB Created: 2020-08-08 06:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 494eac4af1d9869f48d79980cb5866b0 SHA-1: d138bf61dccd7cb374dcafafda5cef6df30496fa SHA-256: d75c01bc8a4a3b0441c33fda5801845e1a6702c5714bdcb8f226a5a364f20e9f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link that, when clicked, leads to a URL designed to appear as a search result for 'strength of materials objective type questions pdf'. This URL is a known malicious redirector. The PDF also contains a large number of external links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. No scripts were extracted from this sample.

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=strength+of+materials+objective+type+questions+pdf In PDF document text
    • http://puzanijo.theoutstandingguides.com/uploads/1/3/0/7/130776031/c84c3d9.pdfIn PDF document text
    • http://files.gowersartclass.com/uploads/1/3/1/3/131380687/diroxewulemixom_mopoke.pdfIn PDF document text
    • http://files.destinationdesignreunion.com/uploads/1/3/1/3/131379540/5c3f34c.pdfIn PDF document text
    • http://files.twiceheroes.com/uploads/1/3/0/7/130775310/9187f3962.pdfIn PDF document text
    • http://xavob.cayugalakehouse.net/uploads/1/3/1/1/131164312/91ee0543.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/1/0431/7147/9713/files/jupijimefunokalonox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5207/1074/files/12579637025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/31037463446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8730/5629/files/wegekiji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8794/4096/files/relao_entre_sade_e_meio_ambiente.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3231/9899/files/scp_containment_breach_nine_tailed_fox_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/pulse_width_modulation_principle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/92836110380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6385/9617/files/minecraft_save_command.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/10276139727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93867881616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/rivezola.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37B 6176 bytes
SHA-256: 25ff0b48c1a15a7ad4371a0336a29143c6d4dba2b385cd189a761404b1765374
font_01_sfnt_off0000b85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85D 10540 bytes
SHA-256: 0b026a4186e4fb03492e824633b253a3dd398f63ed2bb3ac7b3f5044c28bd97e