Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbd9d115efc98a0…

MALICIOUS

PDF

39.8 KB Created: 2020-08-20 04:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: da85647cd80ddd2d5d7b14b214a73b71 SHA-1: 38898557c51317e408a9dca9a4f1913e2651aeb4 SHA-256: efbd9d115efc98a0490f7fa95ffeabb6c05f1d8858c95d07598d8450319e39d8
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though partially corrupted, contains text related to exporting lists to Excel, which is likely a lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which is designed to lead users to further 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=export+list+to+excel+sheet+c%2523 In PDF document text
    • http://files.brandonarthurshindolcsw.com/uploads/1/3/0/9/130969183/gapujekoga_kipav.pdfIn PDF document text
    • http://dabasipe.timthewaterguy.com/uploads/1/3/2/8/132814838/d98110f.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/1/0428/1620/9059/files/different_types_of_bandaging_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/munul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/simibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0708/0610/files/ibps_po_exam_notification_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/introduction_to_microelectronic_fabrication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/pdf_password_crack_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/80032729165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/telecharger_journal_echourouk_algrie_d_aujourd_hui.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4623/0426/files/cartagena_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3794/0122/files/hematology_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/33647917740.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
🗂 Part of campaign: brandonarthurshindolcsw.com 4 samples

Related samples 6

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_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 4836 bytes
SHA-256: 9d554f062c58c83ad3059317ab18ce902853fd9390edc4524ce87b55a171abcd
font_01_sfnt_off00007175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 9800 bytes
SHA-256: 079d31d71b169ec0477e4942e58646c1544f9931202927724e8abfaf85dc9d35

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