Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62bffc184e9aa4a…

MALICIOUS

PDF

50.3 KB Created: 2020-08-30 18:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db204c91fd32ca73f29b7cc40c31569e SHA-1: 6e282cce9e405ebfab45d607ca19c3837d4f5609 SHA-256: a62bffc184e9aa4a1fd5e400d711c9de52916df2e999ea593a70823bd26afb84
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=a2212+motor+datasheet+pdf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into downloading further malicious content. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to obscure the malicious destination.

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.ru/wix?keyword=a2212+motor+datasheet+pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/33008197079.pdf
    • https://cdn.shopify.com/s/files/1/0439/2543/8619/files/fojodizelawi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0307/4971/files/82197671735.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/python_for_data_analysis_2nd_edition_table_of_contents.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/lifor.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9750/files/90048149269.pdf
    • https://cdn.shopify.com/s/files/1/0434/8831/3510/files/litujodafegunuganipakano.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/golulifujawewipusonadise.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1829/files/atkins_40_acceptable_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/7813/0593/files/44223119571.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6079/files/mapebe.pdf
    • https://cdn.shopify.com/s/files/1/0439/3402/3848/files/83252003574.pdf
    • https://cdn.shopify.com/s/files/1/0433/2843/8427/files/mazujegulixasisukaditipek.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/shell_abstract_reasoning_test.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_off00007631.bin
67b4175fb8b391597b91c851a63e26702bcc4d21ebbe41e153fe287591b1ef73
pdf-font-stream PDF embedded font (sfnt) at offset 0x7631 5424 bytes
font_01_sfnt_off00008884.bin
4597555a1b2ac0ad45f386c66ca97504dd95c0b0768238b9dd2b6aecb8dcc649
pdf-font-stream PDF embedded font (sfnt) at offset 0x8884 15884 bytes