Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc115e2ec6540c5…

MALICIOUS

PDF

34.9 KB Created: 2020-08-08 23:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d17006f02d25ef606130679d4d8752dd SHA-1: 6da6f268eca37aa2264e498faec551c38d9ed1a6 SHA-256: fbc115e2ec6540c508ea0aef1591b2519651c7bacdd8e1bdb53d0ac37773cb53
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The primary malicious URL identified is ttraff.com, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to academic materials and URLs, suggesting a social engineering tactic to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=calculus+early+transcendentals+6th+edition+solutions+pdf
    • http://files.rondix-flatcoated-retrievers.com/uploads/1/3/0/7/130738974/59d260.pdf
    • http://siwavulem.outhustleathletics.com/uploads/1/3/0/7/130775085/fifipipodeno-xakoforex-tudagivater-xaredoridolew.pdf
    • http://files.azaharaong.com/uploads/1/3/0/7/130738755/gusodekipekedot_leferakugemapum_dulufodopotozeb.pdf
    • http://files.paindownthere.com/uploads/1/3/2/8/132814972/wapuvagofuzajus_golefikanofiwa_zelibepeve.pdf
    • http://files.bostwickcookieco.com/uploads/1/3/1/0/131071037/nexaxukelo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5481/6667/files/jacquees_me_patron_and_you.pdf
    • https://cdn.shopify.com/s/files/1/0437/7614/7607/files/2000_vw_jetta_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/25183604013.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/design_process_in_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/nios_class_12_psychology_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/39652119484.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/zodinutumivaladi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6724/files/pafovizijukevoxawusano.pdf
    • https://cdn.shopify.com/s/files/1/0433/8099/8302/files/bagiv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004942.bin
c0c994a68dc5dc7deb87087e8663d942d3fdc7ba22a2df4c89690c5210008c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4942 5404 bytes
font_01_sfnt_off00005b9e.bin
7c023f8a08bcd88f0c1f678b30fb5324c2e5530f30f8f21282e3ba3930fee18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9E 10088 bytes

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