Malicious PDF — malware analysis report

Static analysis result for SHA-256 af430e7f69f83812…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 19:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f17f9560fb05dba5a46b8fb5eb8af41c SHA-1: 52c62545ba97f67bda2b4d70c74cb5d90f4666ed SHA-256: af430e7f69f83812f858772a2a0228a5213425fc21aa2ccc2df1bb580f7c081d
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to 'young living essential oils books' and the URL itself, suggesting a lure. The presence of numerous Shopify links, including one to 'id_rsa._pub_permissions.pdf', indicates a link farm strategy. The ML classifier strongly flagged this PDF as malicious.

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=young+living+essential+oils+books
    • https://cdn.shopify.com/s/files/1/0431/5709/4559/files/id_rsa._pub_permissions.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/77934312205.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/51633487080.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/gelaluwadorekito.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/82376210273.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/difference_between_speed_velocity_and_acceleration.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/xetefapip.pdf
    • https://cdn.shopify.com/s/files/1/0433/6821/8780/files/bioinformatics_data_analysis_courses.pdf
    • https://cdn.shopify.com/s/files/1/0435/9005/8152/files/8176385551.pdf
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/nozojinoxifesixolasivedi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8445/4817/files/bimusawapemok.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/92766798865.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/72879631850.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_off0000611b.bin
31cfbe16a207290445379c26a4ee2e18bfce1553b616889517a7acf53f6d4290
pdf-font-stream PDF embedded font (sfnt) at offset 0x611B 4980 bytes
font_01_sfnt_off00007235.bin
cd0cdfe178baf7a2128fbb63ae5c875bef833f037a605d32bc12e923e5415f26
pdf-font-stream PDF embedded font (sfnt) at offset 0x7235 10260 bytes