Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a1fc091fa7df6a…

MALICIOUS

PDF

56.5 KB Created: 2020-08-21 08:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9872e04833ff2caf9a55496042b52657 SHA-1: e69aa43794a870df2abbe1ad0c48340dab9dd945 SHA-256: b1a1fc091fa7df6a985b0e7be3e2a2813cc91623ab4ca3d055a6a06749e9ad5e
202 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector URL. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=python+cheat+sheet+datacamp+pdf', which is flagged as a malicious redirector. This suggests the document is designed to trick users into clicking the link under the guise of downloading a cheat sheet, leading them to malicious infrastructure.

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=python+cheat+sheet+datacamp+pdf In PDF document text
    • http://files.heintzracing.com/uploads/1/3/0/7/130775387/6316247.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/1/0428/8613/5961/files/filsafat_imam_ghazali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/10193586469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/fodunajovubejisip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0269/9681/files/dinarene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/datizujovatebiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/99735347105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0501/6226/files/15368629679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/danivugotaliwuraxeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6762/7928/files/aflac_accident_claim_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/gelukosumivebepijadipaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/88157610537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3885/1751/files/best_c_v_format_in_pakistan.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 5428 bytes
SHA-256: b6ef992adbb12cc7ec3a89597a2ee7381ed7aa771d057dfc428a4c61c2717eea
font_01_sfnt_off00007ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 5368 bytes
SHA-256: 63bb25bfaff00753d3b58ce1e49246b648a2356b7ecdde5a1593fd04ec6e4e8c
font_02_sfnt_off00008cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD3 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off00009560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9560 12776 bytes
SHA-256: e60b74fbe846e6732c17459de6b9c726d64d41b2ebcdff60fb7aeec0421449a5
font_04_sfnt_off0000beec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEC 16240 bytes
SHA-256: 7eb3148ca4796a8edcd9fca583017b72cf18a29c9b0f6f75c091455d64b1e9f7