Malicious PDF — malware analysis report

Static analysis result for SHA-256 543f0b87237ece2a…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 09:40:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 473af1ad7d2d90c716d69e969cfc2d41 SHA-1: b8182fcdd1359ebd9d2ee170def12c6f5d474cd2 SHA-256: 543f0b87237ece2a0056920ce384a80404331dae04367a0752492de885091b31
194 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=robotica+industrial+libro+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous links, many pointing to Shopify domains, indicates an attempt to obscure the malicious destination and potentially leverage legitimate platforms for hosting or distribution.

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=robotica+industrial+libro+pdf In PDF document text
    • http://waged.hadassahcalligraphy.com/uploads/1/3/1/6/131606289/lalufilolomuvip.pdfIn PDF document text
    • http://files.woodturnedwood.com/uploads/1/3/0/7/130776592/2446587.pdfIn PDF document text
    • http://files.cebutoursandtravel.com/uploads/1/3/0/9/130969915/fipobodedipur_mamopaki_fexuj.pdfIn PDF document text
    • http://files.estesartsdistrict.org/uploads/1/3/1/3/131380299/623180.pdfIn PDF document text
    • http://punabufu.mkfitpassion.com/uploads/1/3/1/0/131070767/7500418.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/1/0431/8792/9245/files/wasumupisakerosaxirarit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0433/8077/files/velorupepogonejaxatugudew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9923/4203/files/56321915312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/how_to_make_redstone_repeaters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/bastar_university_change_time_table_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1134/1479/files/jidaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/convert_to_black_and_white.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/89826106888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5265/3973/files/ehsas_program.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/wefokovokasiloduro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3636/0351/files/business_school_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/tofame.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_off00006352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6352 5060 bytes
SHA-256: a05bf2d73f310a10f3f115cf4d9cd5230cadf7a138f34cebd82a7df3653703ef
font_01_sfnt_off0000747c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x747C 10008 bytes
SHA-256: 5e7d3403160ccab48fc2a077caf5379151aa65e3d23b1daa4befbd549465cc2e
font_02_sfnt_off0000967f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x967F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34