Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd5d9ac1c30df80…

MALICIOUS

PDF

45.7 KB Created: 2020-08-21 06:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26aab75ca55769eaa114bf5c3206000e SHA-1: dbfa2cd8f25588e213683a461fea593a6d7e022e SHA-256: 4fd5d9ac1c30df8014094a2556367debe2608c496fd5be61d5cbb3662c27995a
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is associated with a lure for 'creative cloud for pc free'. Additionally, a PDF link farm heuristic indicates numerous external links, with the primary one leading to a Shopify domain. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, suggesting the primary intent is to redirect users to a malicious site, likely for software piracy or phishing.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.ru/pify?keyword=creative+cloud++for+pc+free In PDF document text
    • http://bowupejat.uncensoredtruthaboutmoney.com/uploads/1/3/0/8/130874493/lezidub.pdfIn PDF document text
    • http://dubeze.inbarfrim.com/uploads/1/3/1/4/131407552/lojuwesijebixegerifa.pdfIn PDF document text
    • http://files.poplarbluffdancestudio.com/uploads/1/3/1/4/131406036/buvugugiz_zugotap.pdfIn PDF document text
    • http://files.musicandartattrinity.org/uploads/1/3/0/7/130739444/5830287.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/1/0427/6341/9814/files/xakuvidek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/31618267234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/adverbs_worksheet_for_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1195/5098/files/ejercicios_de_angulos_complementarios_y_suplementarios_con_ecuaciones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/fibonacci_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/vocabulary_for_ielts_reading.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/36018048862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7300/1889/files/candy_crush_saga_2019_mod_apk.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

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_off000074cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CF 4936 bytes
SHA-256: afa253b7addf48adfb3113e7902a6e613b54e66544f71fd417f6b634be0bc67d
font_01_sfnt_off000085ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AD 10756 bytes
SHA-256: a019c6202a7770cb1ab21dc768fe558718d5a169c3163d561a68879f0ff9e3a9

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