Malicious PDF — malware analysis report

Static analysis result for SHA-256 e899203607f82709…

MALICIOUS

PDF

39.2 KB Created: 2020-08-22 15:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd4f2eb6fdb8c094aebf6763dd29318a SHA-1: a2249d7157c31ab2b729c79c9fce1c89f5c9f9ee SHA-256: e899203607f8270906e7ed3e7b926bc1f00e7f13035b9614b6c73193e44dba96
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to the `ttraff.com` redirector, which likely leads to a phishing or malware distribution page.

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=olr+ccli+reporting
    • http://files.amanda-winston.com/uploads/1/3/2/6/132682113/xidujezusepa.pdf
    • http://files.clareslaneycounselling.com/uploads/1/3/1/4/131437484/wizizifofubusim.pdf
    • https://cdn.shopify.com/s/files/1/0437/2987/9194/files/xadorajozejubonabilura.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/siraniratinapudetus.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/68299056184.pdf
    • https://cdn.shopify.com/s/files/1/0435/5309/5844/files/sisazodojubew.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/animer_une_session_de_formation.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4456/files/samsung_vrf_catalogue_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/18843943243.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7341/files/canzoniere_accordi_chitarra.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/61257445692.pdf
    • https://cdn.shopify.com/s/files/1/0433/7546/0517/files/single_streamlined_application.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45287622464.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/17228828206.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_off00005e0c.bin
cf46e0a95b2e3a275818354a7bbab7f47b3423edf35181d51b65680b88f2551e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0C 4740 bytes
font_01_sfnt_off00006e3d.bin
ef4d3af41b4366699043efb895f8823cd8cf1fee9dbd1b5b8ea844c6ba88df0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3D 10064 bytes