Malicious PDF — malware analysis report

Static analysis result for SHA-256 1642f1e7172b4b23…

MALICIOUS

PDF

61.4 KB Created: 2020-08-22 02:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63472ad3c959315df186494b767bfd90 SHA-1: faa1fa5c03cd46c02ae2d40f2270c59ff7a62f73 SHA-256: 1642f1e7172b4b23b35be55825422e865a2f16c8dc9654432a03e95a527a7101
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body also contains a URL pointing to the same malicious redirector, suggesting an attempt to lead users to malicious content. The presence of numerous external PDF links further indicates a link farm or SEO poisoning attempt to 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.cc/pify?keyword=%25D8%25A8%25D8%25B1%25D9%2586%25D8%25A7%25D9%2585%25D8%25AC+translate+blogger+templates In PDF document text
    • http://bajal.provisopartners.com/uploads/1/3/0/7/130740073/kuwok_zezunizerir_piposu.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/1/0434/0521/3847/files/rental_bond_refund_form_wa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/masajaxikimeforodevibim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4698/1023/files/binomios_conjugados_ejercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9350/7739/files/charles_and_boyle_s_law_lab_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/usarec_form_1037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/68975879760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/bafazikefogalipanidina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/probability_distribution_matlab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/set_of_integers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/19920183522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/rekavekupipuximiwepigimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/3777157995.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b6c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB6C9 26700 bytes
SHA-256: 9c88015c403f0efbfbb0083399db186f607daec90d58028be5263fe1dcbf626f
font_00_sfnt_off00006bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCE 5184 bytes
SHA-256: de1aab189fa1906782484dc46f247435805f0094144253b814ada8263ca1b697
font_01_sfnt_off00007d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4E 16700 bytes
SHA-256: a9c043809623e1a45e2df09938f28ce0500eb2272be35616feba24c28d01ba29
font_02_sfnt_off000094a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A7 9872 bytes
SHA-256: d0a08c3c120b318dac69d8895ed1418ee8406ba623532da1b29e28c9641b3307