Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e6aabfa5d4ba30…

MALICIOUS

PDF

41.5 KB Created: 2020-08-29 00:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f138f23368a03597219a3449e29df2be SHA-1: 677ffd3c5fa2714bd44d2268e8ca295b65bea88a SHA-256: a2e6aabfa5d4ba308e70c3edf12d16e6f31539cf6e7164f42d8ea92e30f629bb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to a known malicious redirector. This redirector points to a large farm of PDFs hosted on Shopify, suggesting a potential SEO poisoning or content distribution scheme. The document body contains garbled text but includes the malicious URL, reinforcing the attack pattern. No scripts were extracted from this sample.

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/wix?keyword=my+element+sign
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/woxobogemik.pdf
    • https://cdn.shopify.com/s/files/1/0434/3542/5944/files/nurikixaridesekunavovudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8242/files/wovavadojakejuwebame.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/7505264992.pdf
    • https://cdn.shopify.com/s/files/1/0438/2294/0320/files/dizazobuliwot.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/vuxuvexasu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6112/2974/files/70660216873.pdf
    • https://static.usrfiles.com/ugd/b8c837_65753c6de48c4181ab587ea8a8e608a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_eea862f89f4e476b905f8d61a6bb3ff7.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc105667636b409cac439df943fa0c99.pdf
    • https://static.usrfiles.com/ugd/b8c837_7cf9a98889cb449eb1a9b7c1e855b576.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/56712917090.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/21674669891.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ac4.bin
757e84062aa5c28915c2d4c01db2b057b49b88e6bfaa39b275cc3a3bf3f769ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC4 4484 bytes
font_01_sfnt_off000069f1.bin
03a705a2f89f91c47f9655c6f42d2ee0cbc725856ebbf5ac05314e6a4e6bc9f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 9896 bytes
font_02_sfnt_off00008bc3.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC3 4324 bytes