Malicious PDF — malware analysis report

Static analysis result for SHA-256 850598ae4f33395a…

MALICIOUS

PDF

41.8 KB Created: 2020-08-03 06:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5881150218e78d0765ee78d1b64f470d SHA-1: 63d959e49d7e251115c053a0f56194c722a428ba SHA-256: 850598ae4f33395a618770c4c9c6359e8009f037097b26285df027cfb83538b8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that lead to a redirector service, which in turn points to a large number of other PDF files. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=good+vibration+lyrics', suggesting a lure related to song lyrics to entice users to click on malicious links. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to a link farm or 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=good+vibration+lyrics In PDF document text
    • http://files.sfagingresearch.com/uploads/1/3/2/3/132302732/2d38ee490b2809.pdfIn PDF document text
    • http://files.sharibatheactor.com/uploads/1/3/2/6/132681579/mikuvusutovavi.pdfIn PDF document text
    • http://files.playguitarsolos.com/uploads/1/3/0/7/130776111/bawisilubel-nupogepozife-nugozuminari.pdfIn PDF document text
    • http://files.gypsychicks.ca/uploads/1/3/2/7/132710763/dozozuxoji_wenumu_dajesezili.pdfIn PDF document text
    • http://files.rocketbetty.com/uploads/1/3/0/7/130739596/jofosotipogasukobu.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/1/0427/4513/5260/files/38267891522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7252/7267/files/sabotoluda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5520/8865/files/5551660682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/puzulidakew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/vexefinuvupuwili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/jekojazevabuvim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/76077107679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/binujolitafomilajunite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/vumivafumotodilajaguzof.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 8

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_off00005519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5519 4936 bytes
SHA-256: 1f346b0acb0d6471349f5606f1fc7ba7bdbc4ea5c72453f896ad63baa78dd539
font_01_sfnt_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 12140 bytes
SHA-256: 4a0ae4688d59d3e75949fce2e3d11efcf0c17d031463528a3806d8a35c71ad10
font_02_sfnt_off00008c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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