Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7314a3e5c2c55df…

MALICIOUS

PDF

43.9 KB Created: 2020-08-14 02:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb2431b810ad9c7de2ac2eb65904ffc2 SHA-1: 1b3b913dde87bee7ba81c0e52159dcff544a0fe1 SHA-256: f7314a3e5c2c55dfa087ef11411115f6fd104e31697e627189d7ec6b9088bbc1
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body itself contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute malicious PDFs. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=defensa%20siciliana%20dragon%20acelerado%20pdf
    • http://files.mikehammontree.com/uploads/1/3/0/8/130813427/8382208.pdf
    • http://files.ignite-the-change.com/uploads/1/3/1/4/131483830/4576631.pdf
    • http://files.fredpoisson.com/uploads/1/3/1/4/131453065/bc69c9129881.pdf
    • http://mibelulo.indypolevaultjumpscamps.com/uploads/1/3/2/8/132814930/0c39b33f5b.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/wipoduduxupimezele.pdf
    • https://cdn.shopify.com/s/files/1/0437/6474/4343/files/diy_rubber_band_gun_template.pdf
    • https://cdn.shopify.com/s/files/1/0438/2742/9536/files/jexexamapawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/2259/6768/files/xijisemumumufojileg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/45023286902.pdf
    • https://cdn.shopify.com/s/files/1/0435/6040/3103/files/jekavipunexukolefoxibupaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/gadilifatajaxuwetev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamawogedeveredu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/2897837715.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/13328054181.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/14275240437.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75815848510.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_off00006d3c.bin
29db68b456dff64c8797547a84f001fc60e6ecc31ed698b3d4b499999ffbfa1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3C 5320 bytes
font_01_sfnt_off00007f69.bin
69c2c98a51c0ae528404a0817f843e370ff5be553f877f2fb573013acb44dbac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F69 10360 bytes