Malicious PDF — malware analysis report

Static analysis result for SHA-256 3926b1499f0f9a1e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 23:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0495651a832efb51fbb849cd0b4a7669 SHA-1: b73e209ec07b567711d255ceffd04849b1ed6ce0 SHA-256: 3926b1499f0f9a1e68df4bf2f4e9088ed33b7fd49c0b34aa89881104862cfeb6
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body text, while appearing benign, is used to disguise the malicious intent of these links, which are presented as 'self evaluation job performance examples'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=self+evaluation+job+performance+examples, which is a critical finding.

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=self+evaluation+job+performance+examples In PDF document text
    • http://jukituz.chuckanuttransition.com/uploads/1/3/1/4/131437792/bewekoj-dufaxon-xadejivigalebo.pdfIn PDF document text
    • http://files.standepiscopal.org/uploads/1/3/1/4/131409017/b14f5492492.pdfIn PDF document text
    • http://xabiluse.roadwaysport-n-trailer.com/uploads/1/3/1/0/131070054/6789bd.pdfIn PDF document text
    • http://files.robertalberino.com/uploads/1/3/1/6/131636762/6159883.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000060cb.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000060cb.bin)
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/little_toy_guns_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/canny_edge_detection_matlab_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2516/2652/files/better_self_journal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/las_brujas_de_eastwick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5502/files/boxuxupuwiximis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/55380465707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/texte_allemand_facile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/vonoxefodiranolej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7308/5341/files/cabinet_vision_for_mac.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 extracted file (font_00_sfnt_off000060cb.bin)

Related samples 2

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_off000060cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CB 5608 bytes
SHA-256: 96cd95d7ebcb8723ec76faacf27257da2e1acfc45d0929d47ea11ef9cccfe4a9
font_01_sfnt_off000073d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D2 10056 bytes
SHA-256: 44304d71b8b49d3fb0a1ceff2f27d8ce8a48d5dcb9624cf14ff3b7c8ec4fcf35

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