Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2a9c4e30dc4c25…

MALICIOUS

PDF

36.9 KB Created: 2020-08-27 16:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c10663a178696d7b37f92879a071a1e SHA-1: c1f109fbd139dfae9e6b508c5388c7706cfc2696 SHA-256: 0c2a9c4e30dc4c25bdef78edc1c91d877fb9343e98459162d9f2648eb0af6cbf
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a specific PDF, and also includes the malicious URL. The presence of many external links suggests an attempt to manipulate search engine results or distribute content through a link farm, ultimately directing users to malicious infrastructure.

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=covering+islam+edward+said+pdf+free
    • http://files.judyzpiano.com/uploads/1/3/1/4/131406427/xelubajobojazutuma.pdf
    • http://files.dandressler.com/uploads/1/3/0/7/130738596/2741966.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/gipis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/95084362510.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/lowes_easley_sc.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/catalogo_placche_axolute_bticino.pdf
    • https://cdn.shopify.com/s/files/1/0433/9449/8709/files/fun_halloween_worksheets_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0437/7614/7607/files/courier_final_draft.pdf
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/bookkeeping_vs_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0430/2526/8889/files/36247905611.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/7509998167.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/35849254675.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005222.bin
16cdbeed247cc8416ff3d9e89f21e221ccebadc75f14eeca53c32a3cfcd93347
pdf-font-stream PDF embedded font (sfnt) at offset 0x5222 5420 bytes
font_01_sfnt_off00006495.bin
3d78b0596ec0a8aa1a37aa1a142a6cd8d04e8b71f910807bffe931ae911def4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 10040 bytes