Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a54b514c7185576…

MALICIOUS

PDF

41.9 KB Created: 2020-08-07 01:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f9afa25df61561d61e5747913955690a SHA-1: 2f94c87745867fa376d1b447d036f38a60d813d3 SHA-256: 3a54b514c71855766c3e8011db5aef776487e2214fce7cb2685ff6c6e0c5ab89
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting a deceptive lure to drive traffic to malicious 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.ru/pify?keyword=august+calendar+2020+printable+pdf In PDF document text
    • http://files.careerprospectslimited.com/uploads/1/3/2/3/132303286/1891009.pdfIn PDF document text
    • http://files.thecathedral.us/uploads/1/3/2/8/132815220/2816990.pdfIn PDF document text
    • http://files.elikalnonwoven.com/uploads/1/3/0/8/130814208/2d41ec9126ebed.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/1/0428/2223/8374/files/class_11_chemistry_book_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/digesto_juridico_de_la_provincia_de_misiones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0182/2875/files/vomiwajelulojaraba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/96708075710.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/63153762532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5883/2294/files/92265847007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/the_outsider_albert_camus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3854/6840/files/88156243515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/genelurovikotogugawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobuwavidojanunixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/ssh_tunneling_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/default-_ssl._conf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/44049498166.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 5

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_off000065c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 5728 bytes
SHA-256: 649d0c6e090057154194f8b6973753d90bca36632a322925e5fe0bbbb01d67e1
font_01_sfnt_off00007957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7957 9660 bytes
SHA-256: 0429385cb4cfad8db6c23380936a060005cb178c94ad40faf8218ce91266ade2

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