Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3e12510821b7d8…

MALICIOUS

PDF

45.3 KB Created: 2020-08-09 14:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f75b54820323023c8d8d5359ce739ee9 SHA-1: a5a8cda2b99bd7156d36a5b388c19925959f8ac3 SHA-256: 8b3e12510821b7d80984f246b633fc8bdd5b6d0a4af9476aac13f49bdbe2e4ea
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a link to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for a specific PDF download. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic and potentially distribute 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.ru/pify?keyword=allahabad+high+court+aro+paper+pdf+download In PDF document text
    • http://kogowuxo.oliviacliftonbligh.com/uploads/1/3/2/8/132814930/satenojov-sofigo-rivavu.pdfIn PDF document text
    • http://files.colemansmoll.com/uploads/1/3/2/8/132815008/firitumemekibule.pdfIn PDF document text
    • http://kizozujav.plant-miner.com/uploads/1/3/1/4/131453870/ruzapux.pdfIn PDF document text
    • http://files.hollywoodlandpod.com/uploads/1/3/1/3/131398143/de2c65b29d1e69.pdfIn PDF document text
    • http://files.wvcls.org/uploads/1/3/0/7/130738921/c44847fc84f711.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/1/0428/5025/5014/files/xuminevoledosamejorinuroj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/sajetirajiruzefuxupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/32438807219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/zojivebuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/77146994460.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/monster_manual_3_3._5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6776/0028/files/management_of_gestational_diabetes_mellitus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/jegonus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/mosasidiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/xinput_compatible_hid_device.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCB 5460 bytes
SHA-256: f91ba26c459c42daff64f5785a00463daf76f60a5d3ab18063151958737621ba
font_01_sfnt_off00007068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7068 10092 bytes
SHA-256: cad22eb7599f9c80a77e396d62aef24aefb74bcd2ec27bc75233995a07f8a0cd
font_02_sfnt_off00009330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9330 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2