Malicious PDF — malware analysis report

Static analysis result for SHA-256 81977193676fadf7…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 21:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d243f99d0fed6a0583a221c15225c887 SHA-1: 6b3b4d457e99894b4ec6df427a7d038d120fec43 SHA-256: 81977193676fadf75531e36b8f3a91d17031235d3d998fef87a04e553d9d88e7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to CV templates, aiming to entice users to click the malicious link. The presence of a link farm further indicates an attempt to distribute malicious content or phish users.

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.cc/wix?keyword=professional+cv+template+free+with+photo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/perirekamitujas.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/1452077209.pdf
    • https://cdn.shopify.com/s/files/1/0441/2047/3752/files/adventure_tourism_activities.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/3087457393.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/valguero_boss_arena.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/vizebidujatosabuzizarewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9803/files/electrical_engineering_ebook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/kidazutolovuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/95801134640.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/best_antivirus_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0449/7106/5503/files/adjetivos_de_personalidad_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/87912067473.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_off0000660c.bin
e4a2624cd055ce828894ab311bb2ce865375e1acc0f53be3361fe5c9079943e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x660C 5408 bytes
font_01_sfnt_off00007860.bin
6e28d054f6922bc5281fd267ee07eb36ea2afb18dab31108a9493278a1beb027
pdf-font-stream PDF embedded font (sfnt) at offset 0x7860 10376 bytes