Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eea3bce46f3caf5…

MALICIOUS

PDF

44.0 KB Created: 2020-08-23 03:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3beb8508a47854b0b7d7691bf8347dc SHA-1: aad54ada8331613c842388ba402fc99eaffff1ea SHA-256: 5eea3bce46f3caf58b4628cebb9f2d6779d626822721eb5ab32f586697d75875
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify, and one critical link redirects to a known malicious infrastructure. The document body, though obfuscated, contains text related to a recipe and the malicious URL, suggesting a lure to trick users into clicking the malicious links. The presence of numerous external PDF links indicates a link farm used for SEO manipulation or to host further malicious content.

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/pify?keyword=chicken+bruschetta+sheet+pan+dinner
    • http://files.beyondthestorycoaching.com/uploads/1/3/1/4/131437313/gezusiroban_joliviti_xesod.pdf
    • http://kefit.lora-gray.com/uploads/1/3/1/3/131383483/7820790.pdf
    • http://files.mrbevan.com/uploads/1/3/0/8/130874361/3542070.pdf
    • http://files.anarchydieseltuning.net/uploads/1/3/2/3/132302982/kolodonifusukiw-kotabenedugoku.pdf
    • http://files.kanimambocreations.com/uploads/1/3/1/6/131637186/df7f91095.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/vizuvivurarawuguluj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/pitegemepuvalo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/finozedikuxesuja.pdf
    • https://cdn.shopify.com/s/files/1/0437/5651/9578/files/44630903395.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/65498085273.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/mother_goose_nursery_rhymes_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/fovorenodereni.pdf
    • https://cdn.shopify.com/s/files/1/0434/9159/0308/files/lejojekojijabedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rokagarunawawutasa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8828/1761/files/attach_iphone_email_reply.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_off000062eb.bin
3a785caa3cea2e43051f7c8f8f7e26d4c88f051eeb28fac7f988276720bd50da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EB 5240 bytes
font_01_sfnt_off00007494.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 1800 bytes
font_02_sfnt_off00007d22.bin
c2c64c6fec3f608edc86dbc26a31e2041c4adef87e718990fb431b9bca0dba82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D22 10912 bytes

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