Malicious PDF — malware analysis report

Static analysis result for SHA-256 d289ea01b1ab990e…

MALICIOUS

PDF

48.9 KB Created: 2020-08-13 01:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d767686fe73f1fd5e6067c4e18245273 SHA-1: 7235274264c83f4e59a49dccdf5e66a263c600f9 SHA-256: d289ea01b1ab990eddc940c8656b79a1603785caf888da519dba70e9c1daaaff
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, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL for the malicious redirector. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link farm or SEO spam tactic, with the primary malicious URL being the most critical IOC.

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=aleksandr+dugin+libros+pdf
    • http://files.vailmassagetherapist.com/uploads/1/3/2/6/132695280/e3627.pdf
    • http://files.autismispants.com/uploads/1/3/1/6/131636914/6441982.pdf
    • http://fezaw.fclcpreschool.org/uploads/1/3/0/7/130776208/wisusix.pdf
    • http://files.domaszeromskasmusic.com/uploads/1/3/1/1/131164440/dokid_lovuwedokam_vedetuxuxefofuf.pdf
    • http://files.milkshedcatering.com/uploads/1/3/2/6/132680796/28a7f3.pdf
    • https://cdn.shopify.com/s/files/1/0427/4746/1788/files/lawenukamudoporusekuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/lobovuvima.pdf
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/48729371452.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/36700458766.pdf
    • https://cdn.shopify.com/s/files/1/0437/6254/8887/files/lokmat_epaper_osmanabad.pdf
    • https://cdn.shopify.com/s/files/1/0435/2793/0011/files/academic_english_reading_and_writing_across_the_disciplines_unisa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/34726945336.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/perab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/fagivifibatanifopav.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/advanced_aerodynamics.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/burger_king_sa_menu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/62419441305.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2950/files/xisavemujisiwuji.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_off00007b0c.bin
b6123d93853b2ccb47812060bdb9573d3eec1374224a6b8203481629ea14e4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0C 5404 bytes
font_01_sfnt_off00008d68.bin
5cbf026a8a41fc9fdb5381d581c9a001c075ac8383ae56fd0104b7f52d34d904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D68 12924 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.