Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d6cc775bf4b9f4…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 23:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b23b8dfbd65ac3c4d5a49e1daf557ef6 SHA-1: c5c3ee49093abb29701971c027a7cb2322b29bfc SHA-256: b7d6cc775bf4b9f4af9dd6b97cc44adf723093561f2b73834d98f8d51c1f0222
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, contains the target URL and related keywords, suggesting a phishing or redirection scheme. The ML classifier strongly supports the malicious nature of this PDF.

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=application+software+meaning+pdf In PDF document text
    • http://files.salvoselfdefense.com/uploads/1/3/1/3/131398598/4175054.pdfIn PDF document text
    • http://files.tasteandseebakery.org/uploads/1/3/2/7/132712096/nurodid.pdfIn PDF document text
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdfIn PDF document text
    • http://darupep.roselleyouthtrack.com/uploads/1/3/0/7/130739038/5065190.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/1/0433/8827/2807/files/stick_figure_fight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/vigunepurul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1566/5826/files/30474742039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/comment_apprendre_l_anglais_facilement_et_rapidement_gratuitement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/python_data_structures_and_algorithms_benjamin_baka_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/21346258609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9521/2697/files/34502611399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0429/7375/files/mumafekibutuxezazasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/35844489142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/35415017578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/47910952141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/mevemuvisatalezimowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6899/7286/files/autocad_commands_list_with_explanation_in_urdu_free_download.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_off00006739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 5344 bytes
SHA-256: b1a419661fd0153b5b0c549ef34c40383113918a332ff9a0c45ee3dd849c7a97
font_01_sfnt_off00007952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7952 9972 bytes
SHA-256: 4f943bd67f0d03c80bc7640cd893a5794027f1d2503687450c18e6fd7f9f0b25
font_02_sfnt_off00009b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B18 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176