Malicious PDF — malware analysis report

Static analysis result for SHA-256 281aaa6d0fcbae97…

MALICIOUS

PDF

38.3 KB Created: 2020-08-15 02:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f18153ef395ab029c213bc0dd2ee6e2d SHA-1: 7e85950faca627db5c5b4c8fa701f57df09272cb SHA-256: 281aaa6d0fcbae971844483ec73fd6b0f204dd4a4dd5b73a74a793fbb94f2a45
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a deceptive lure related to visa collection, which is a common social engineering tactic. It embeds multiple links, one of which, https://ttraff.cc/pify?keyword=authorization+letter+format+for+visa+collection, points to known malicious redirector infrastructure. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's designed to host a link farm for SEO poisoning, further supporting a malicious intent to redirect users to harmful sites.

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=authorization+letter+format+for+visa+collection In PDF document text
    • http://files.c3pojhmi.com/uploads/1/3/1/3/131380337/6c37a1.pdfIn PDF document text
    • http://wubim.suzytbophotography.com/uploads/1/3/1/8/131856033/palesaponijoti.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/1/0434/9594/8454/files/sixofip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/sezivotakugigafugarixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ayat_ruqyah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/6824357599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/63247088862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9652/9313/files/union_budget_2020_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/software_engineering_process_models.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/arms_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/arabic_writing_practice_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/sahih_al_bukhari_urdu.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 1

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_off0000595a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x595A 5220 bytes
SHA-256: e8e991bb8cf953f04ccfb2f2eae17d72a9e291bc6a0f1dd3bb63a0ffcf131434
font_01_sfnt_off00006afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFD 9744 bytes
SHA-256: 2f9a221d458add74c32f6d29c27db7995ca2c85f43da71b3136790599f4324ff

Open this report in the interactive analyzer, or submit your own file for analysis.