Malicious PDF — malware analysis report

Static analysis result for SHA-256 d452273f63ebeb73…

MALICIOUS

PDF

46.8 KB Created: 2020-07-29 09:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 212b87658a295988a91aabca9f0890e4 SHA-1: 51bb26ada72995e124a7a40afb6f1a671c80486b SHA-256: d452273f63ebeb732dda1e16772e8c20a90bc38662abeaa8f5bfe625ce0965cc
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector and a link farm. The document body, though heavily obfuscated, contains text related to a movie title, suggesting a lure. The primary malicious IOC is the redirector URL, which is likely used to funnel users to further malicious sites.

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=anjali+anjali+pushpanjali+movie+songs
    • http://files.marcoperi.it/uploads/1/3/1/3/131383838/98c6dc597a8.pdf
    • http://files.youngthinkersofamerica.com/uploads/1/3/0/8/130814340/komafuma.pdf
    • http://files.abuyerschoicetampa.com/uploads/1/3/2/7/132741225/wosawumedanip.pdf
    • https://cdn.shopify.com/s/files/1/0429/4184/1571/files/60957798892.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/53912880294.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7183/files/zugojigabijinodevo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/86870540094.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/86193091179.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85213016947.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/96449466960.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/lebejuvezuliviwomapulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56773010908.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/28103705638.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/95920082155.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/14908666535.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/
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e31.bin
7fe7f6425704d8415e810a6f35c0f8b8e0d7f11e7431351228a444e2dbf7f338
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 5064 bytes
font_01_sfnt_off00007f40.bin
c79be2d06a8ec20148095f9afed17acf77566b2276fda1613eccd02d8dee704e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F40 15008 bytes