Malicious PDF — malware analysis report

Static analysis result for SHA-256 182a8fcd5dbb9798…

MALICIOUS

PDF

34.0 KB Created: 2020-09-01 00:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb9ae69708820ddf127292bb30f3a5e SHA-1: bf50e4f0b9c892e16a05c48e4e70b1db27c40633 SHA-256: 182a8fcd5dbb97983201fb1239650709142b7f111881509fc349926cb60264dd
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body and heuristics indicate a lure related to movie downloads, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence point towards malicious intent.

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=einthusan+tamil+dubbed+movie
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/nstm_555_revision_13.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/bidojuluwixeninefeka.pdf
    • https://cdn.shopify.com/s/files/1/0440/8947/5237/files/xaxibalesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62114329075.pdf
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/19111332249.pdf
    • https://cdn.shopify.com/s/files/1/0437/0920/2597/files/14228411689.pdf
    • https://cdn.shopify.com/s/files/1/0429/9656/4131/files/13045937831.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/89766608214.pdf
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/panojojofupawaxub.pdf
    • https://cdn.shopify.com/s/files/1/0428/4484/8295/files/band_of_brothers_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/84538203351.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/message_locker_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/17234832992.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/kakamega_county_jobs_for_form_four_leavers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1254/files/wukuxuzifu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a4e.bin
1eab9c9bd62895ab8b66b74e0d45b78219946fa6cec4e0589b0d75b6d3d5107a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4E 5128 bytes
font_01_sfnt_off00005b99.bin
09109268354ef513913b8c1b39efcd9fb44bb84045c56b0765432ac49533c71c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B99 9260 bytes