Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9bcd7e1b9faffe…

MALICIOUS

PDF

45.9 KB Created: 2020-08-12 16:38:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de658dd001a17706ed93b48c94fd63a2 SHA-1: 2a26b597d192608a5367b8ba13dbc27372d266fc SHA-256: 0d9bcd7e1b9faffe9fa85392a091d21f529f4c8afdb60f87b4192856938318ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'behavioural finance book pdf'. The presence of a mass external PDF link farm further indicates a malicious intent to distribute harmful content or redirect users to malicious sites.

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/wb?keyword=behavioural%20finance%20book%20pdf
    • http://tanufa.yogalindsey.com/uploads/1/3/1/3/131378950/daxanodejaleruwit.pdf
    • http://jadenix.stefaniegraperphotography.com/uploads/1/3/1/8/131871390/roxikavadawuleg.pdf
    • http://files.uhbauerwomensociety.com/uploads/1/3/1/6/131637240/vexifukumite.pdf
    • http://bijubola.devonvintagecarclub.com/uploads/1/3/0/9/130969358/lijav_gezuduwolavu_zikej_jazikakufotor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/64882141636.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/blister_packing_machine_change_parts.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/80649696199.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75904593322.pdf
    • https://cdn.shopify.com/s/files/1/0438/2595/4973/files/voranixesipoxorexopavivam.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/jetibefo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/new_headway_beginner_fourth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5181/files/infinity_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51906755497.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/bsc_1st_year_inorganic_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/roleriguf.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006879.bin
c5a5addd50b8667767630cf2beabef97bea1740ce519717d2e70d38d517c9d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6879 5180 bytes
font_01_sfnt_off00007a0a.bin
0854a224a24ff9e74867a15e17fb7f2c0333868e3627bffc6aa95532d19abc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 10064 bytes
font_02_sfnt_off00009c7d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7D 4324 bytes

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