Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb44e6af6cbebb0…

MALICIOUS

PDF

38.4 KB Created: 2020-08-15 04:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcc5927afde630ede955611e0ce7e273 SHA-1: 6afccde71d3d35c9c0c100f537168653f4f473c3 SHA-256: 7bb44e6af6cbebb09bc5313e2884d1b5675310d80946c25906fc2a18ef12ab73
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.com/pify?keyword=azhage+azhage+tamil+album+song+video'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to shopify domains. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same redirect URL, suggesting a lure to a malicious site.

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=azhage+azhage+tamil+album+song+video
    • http://vaduj.zenergymassage.net/uploads/1/3/2/6/132696483/7163033.pdf
    • http://vogali.worldnear.com/uploads/1/3/1/4/131438177/2165915.pdf
    • https://cdn.shopify.com/s/files/1/0451/7157/2885/files/xeraxefezuravawojitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/13664101632.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/uss_biology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/gibebitagagodusetuliju.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/barmenia_rechnungsapp.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/thyristor_firing_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/48861913079.pdf
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/derokewegatuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/kozozuki.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_off000057a6.bin
f3c90023b3869d1ffdb9d9c29370fed2a43edba05c428d0756339dc223f79709
pdf-font-stream PDF embedded font (sfnt) at offset 0x57A6 5384 bytes
font_01_sfnt_off000069df.bin
4be93f7e66c1a8a4423984ae35133b4dcee8857cc9581fae8f2518ca0f658f04
pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 10292 bytes