Malicious PDF — malware analysis report

Static analysis result for SHA-256 a445973c56adc961…

MALICIOUS

PDF

46.6 KB Created: 2020-08-11 02:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6146f4980dfd886bd57b135037a96eeb SHA-1: 9bc0b91e4cebe2ac16524c0577a01249bf7b225b SHA-256: a445973c56adc9613a479be0ecbe11b1320d56d0fa701278619ce5cb45127399
202 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=autocad+course+pdf+file', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Autocad course pdf file' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a visual download button heuristic further supports this phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=autocad+course+pdf+file In PDF document text
    • http://vadogoka.olddonationband.com/uploads/1/3/2/3/132302782/72162f14.pdfIn PDF document text
    • http://files.lowercreekcreations.com/uploads/1/3/1/4/131452887/1962873.pdfIn PDF document text
    • http://files.lorraineeljuga.com/uploads/1/3/1/8/131860787/f217d2b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0685/3269/files/rusemobalajat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1053/1238/files/22400356183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/kukezasolalodal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/34325066469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/ritoribipex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/50212521200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/4402/2944/files/arduino_uno_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3717/5456/files/testing_the_validity_and_reliability_of_research_instruments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3341/6095/files/kuxezosupowimigexuvuvik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/90198628966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/estructura_de_los_materiales_inorganicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4089/0262/files/vonelesojepakujat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/57234209283.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3C 4916 bytes
SHA-256: bbd62af3fada84e0d934de2e238c87eeb30802cacb28790dbc50c262d0f74bf4
font_01_sfnt_off00007d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D03 10128 bytes
SHA-256: e94110160219e74259905fe92f2df5d2a05dbd1688e7c443f42136197933d9a4
font_02_sfnt_off00009fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3