Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bb2f0be9b51535…

MALICIOUS

PDF

40.1 KB Created: 2020-08-25 21:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bccf04bac035a28bac286b4de1acae2b SHA-1: d9ba0ed9aa45c4edee07a35dd13ac035bea02c7f SHA-256: 77bb2f0be9b5153534cf848c69733197a11f15a8a7d1556ab6e8d215f035df16
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to redirector infrastructure like 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting it's a 'guide' and includes the malicious URL, indicating a lure. The presence of multiple PDF links and a redirector suggests an attempt to drive traffic to malicious content, likely for phishing or malware delivery.

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=osrs+skiller+guide In PDF document text
    • http://nakavo.vallenduuk.pl/uploads/1/3/1/0/131070382/labolilasuk.pdfIn PDF document text
    • http://files.voxelquest.com/uploads/1/3/0/8/130873735/pewobaletitonulum.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/1/0437/6428/5592/files/rexoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3106/7813/files/78413354401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2195/1391/files/sapafafijuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7102/6853/files/rpa_robotic_process_automation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9586/7797/files/astringedent_safety_data_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7148/8668/files/vinexarukiduzewiref.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/adjective_worksheet_for_class_3rd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/zexidiwuwixirubas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/22619216597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/sozowiwixiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/45695514457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2478/files/34477142797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4161/9100/files/36920849018.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_off0000615c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615C 4876 bytes
SHA-256: 7daab35bcf7a4af58764acd5faef6a9b60acde1630f2d1c3384b8ed62c25d051
font_01_sfnt_off000071fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71FE 10012 bytes
SHA-256: d16d93bd87e5bae5e83edc3b0ed0fecc94a76a0ea843a432939f24218154f027

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