Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a780cde1559a57…

MALICIOUS

PDF

42.9 KB Created: 2020-08-13 07:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 721bbb4f7cc3ad1821bfa6ec753a7e34 SHA-1: af9da2ef730cebb508612a44cc558ee6ed931710 SHA-256: 03a780cde1559a57b3a7dfe0fe0d8f7060cc196b8dd208ecf7ef19f71496cd12
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a redirector service that is flagged as malicious. The document body mentions 'Atomic habits free download pdf', suggesting a lure to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a compromised site or download further malware.

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/wb?keyword=atomic%20habits%20free%20download%20pdf
    • http://files.bobbijasayphotography.com/uploads/1/3/1/3/131379671/e8155686b.pdf
    • http://files.freshburies.com/uploads/1/3/1/3/131384070/metuserekom_fazigegod_bibejes.pdf
    • http://files.singaloud.co.uk/uploads/1/3/0/7/130775607/gukiwuxotuzeriwu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/letexebomibobupigarubuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3721/files/rasafu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/anime_osu_skins.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/25722304583.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/dinerdash_flo_on_the_go.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8348/files/food_quality_assurance.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4432/files/34693909507.pdf
    • https://cdn.shopify.com/s/files/1/0432/3157/6231/files/pf_withdrawal_form_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/94719592845.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/gukatajivebilozuwaliw.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/tesenanepedav.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_off00005fa6.bin
fbe66003beba2b958e625d069bb1fd9fe9236c4626cd1f9723aaaf84c1c4db2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 5616 bytes
font_01_sfnt_off0000729e.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729E 1800 bytes
font_02_sfnt_off00007b2c.bin
d07a9e7a43572b6bd29935da21b1ffa0ecc8f1cd9c1ea358affba0a4de964d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2C 10292 bytes

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