Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9592dc799c162b…

MALICIOUS

PDF

40.3 KB Created: 2020-07-08 20:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 66c61318fc75cf8bcd62d7df4e83b669 SHA-1: ab36abc271203cc7c384592b2f28f0599b2a330f SHA-256: cc9592dc799c162bb4d4372916d755fa40c94ce0593542f892497da867f75b19
184 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'Calculus James Stewart 8th Edition Solutions PDF' and embeds a large number of external links. One of these links, 'https://ttraff.com/wb?keyword=calculus%20james%20stewart%208th%20edition%20solutions%20pdf', is identified as a malicious redirector. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO abuse for traffic generation. No scripts were extracted from this sample.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.com/wb?keyword=calculus%20james%20stewart%208th%20edition%20solutions%20pdf In PDF document text
    • http://files.tactmealcenter.org/uploads/1/3/1/4/131438167/2128811.pdfIn PDF document text
    • http://files.jariosvega.com/uploads/1/3/1/8/131856365/pofurudavi-xitokumi.pdfIn PDF document text
    • http://files.peakhealthcaremaryland.com/uploads/1/3/1/4/131406816/rizapisopasiraluzoga.pdfIn PDF document text
    • http://files.icchebuet.com/uploads/1/3/2/6/132681671/nomixo_namukelobof_wisukufigajefuj_litamepofolotot.pdfIn PDF document text
    • http://files.bozemanhelpcenter.org/uploads/1/3/1/4/131437636/6230845.pdfIn PDF document text
    • http://files.thebetterbrasspipe.com/uploads/1/3/2/7/132740218/daf3e1d8396c143.pdfIn PDF document text
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdfIn PDF document text
    • http://files.illinoisdelta.org/uploads/1/3/2/6/132681938/2186787.pdfIn PDF document text
    • http://files.didsburyjuniors.com/uploads/1/3/2/6/132681824/maxipupamekep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jegakalo.files.wordpress.com/2020/06/rilodukulepunigova.pdfIn PDF document text
    • https://vowuwatoxamo.files.wordpress.com/2020/07/36198255425.pdfIn PDF document text
    • https://bamosel450593673.files.wordpress.com/2020/07/61326872998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5681 5664 bytes
SHA-256: 65b7ce589a53f2969b0bc2cc63ecc75f7f28ae1a93c02c8e3d9389134485ab56
font_01_sfnt_off000069ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AE 13244 bytes
SHA-256: dde796dcb3ae57e0c039356d0ebb64c1e0d186fae3a01c9f44bbb0c934e2072f

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