Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c643b2183d4e173…

MALICIOUS

PDF

47.9 KB Created: 2020-08-20 01:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a5c07db38d8910c17c856767f1051085 SHA-1: d55a98035f543c997182d63c4763c6abd7986047 SHA-256: 4c643b2183d4e173661666855da57ec7cc4294f6dfc56fc6cd899becdf8468f9
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/pify?keyword=city+hunter+ost+suddenly+piano+sheet+music, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, contains references to the lure content and the malicious URL, reinforcing the phishing attempt.

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=city+hunter+ost+suddenly+piano+sheet+music In PDF document text
    • http://files.lenazavaroni.co.uk/uploads/1/3/1/4/131407530/jolis-duwubak.pdfIn PDF document text
    • http://files.racialreconciliation.net/uploads/1/3/0/8/130874435/wibokomigalusa_zimebawixuli_wunopuz.pdfIn PDF document text
    • http://pevugo.goldenbeemx.com/uploads/1/3/1/1/131164250/976981b.pdfIn PDF document text
    • http://files.shipanna.com/uploads/1/3/0/7/130739431/5a5d4caac1fe.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/1/0428/6044/5855/files/13370788987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/36693079589.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/lopezomakikavuresubaruma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9269/5456/files/partnership_accounting_journal_entries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/lodovolasedip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7768/7706/files/ejercicios_something_anything_nothing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/76917478167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/danexapazodetomekiwifekel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6492/6111/files/zejulosarirovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8432/3741/files/48449569514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/honda_hrv_manuals.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5344 9944 bytes
SHA-256: 932d206ae6e4aed544b6e92667064e250b3eb33bb1ab4135799f5a1b446b1e4a
font_01_sfnt_off000073a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A5 5320 bytes
SHA-256: 8326dc78b38880d8f3a0ef34df4920597ea85fbdbffa656ba91dc4650f1c5a6c
font_02_sfnt_off0000858c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858C 13884 bytes
SHA-256: f087f815bbec92767387cdd71112801df22faa157bb5af456c033294f09a0152

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