Malicious PDF — malware analysis report

Static analysis result for SHA-256 008bb8a0798e2556…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 11:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22fdf9ab7e4025caec7c4a6951357600 SHA-1: d4737f24e2faf18bacb256c58f0e218ef70b834a SHA-256: 008bb8a0798e25566575807e024024cc44a6e6b25aa1a32b1346bf5784065197
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wix?keyword=hp+pavilion+dv4000+wifi+drivers+windows+7', is designed to lure users into downloading potentially malicious files by impersonating legitimate driver downloads. The presence of a large number of external PDF links further suggests a link farm or SEO poisoning tactic to increase visibility.

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/wix?keyword=hp+pavilion+dv4000+wifi+drivers+windows+7
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c6162e7ae99f4d2786f0eabd5d9605a5.pdf
    • https://static.usrfiles.com/ugd/55cc32_f6d13579e592432497056ebb8f10f174.pdf
    • https://static.usrfiles.com/ugd/b8c837_61f6670e4eb74da582f67b161bb55618.pdf
    • https://cdn.shopify.com/s/files/1/0460/6545/1163/files/apotheken_umschau_september_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/5330/0377/files/51478010827.pdf
    • https://static.usrfiles.com/ugd/db93e9_c0b0a70aa1604a8ea92b7078cc599d71.pdf
    • https://static.usrfiles.com/ugd/0e2875_83feeb4db1ea4631a519411a512e887c.pdf
    • https://static.usrfiles.com/ugd/70c1f8_9dff5c40a5fa4ce7bab960957226ed66.pdf
    • https://static.usrfiles.com/ugd/01bc73_c5c65dc7c957473a8f9b98686b31226c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2971500a16c6426c9a06f2667ab0b9e6.pdf
    • https://cdn.shopify.com/s/files/1/0445/6975/5812/files/94100227733.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/partitioning_a_segment_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/20197794688.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_off0000650b.bin
91432177bd149c5277d2c559780203e19d35bb93a39ff68eb577742999a22a03
pdf-font-stream PDF embedded font (sfnt) at offset 0x650B 5460 bytes
font_01_sfnt_off000077c2.bin
7c8c966b73722381e3f9047b84b9529c4e9bda1886005cf80251f4c0226d7ff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C2 10704 bytes