Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f2dd2242ef2d1b…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 15:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2ed76bc04a41c3ddf4fcd8630428602 SHA-1: 39e8717f5ab5cb0d0954507d846914e5b4dc0da4 SHA-256: 89f2dd2242ef2d1b14cd4f120772f3f559012a61a9db77303eaa999845995b00
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search engine results, with one prominent link redirecting to a known malicious domain. The ML classifier strongly indicated maliciousness, and the PDF structure includes numerous external links, many hosted on Shopify, suggesting a link farm for SEO manipulation. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cause+of+diabetes+type+2+pdf, which likely serves as a redirector to further malicious content.

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=cause+of+diabetes+type+2+pdf
    • http://files.cheersatthepier.com/uploads/1/3/2/8/132815003/nanuvurisilitoz.pdf
    • http://files.vicenzas-crostoli.com/uploads/1/3/1/4/131483253/9062675.pdf
    • http://files.anthonstmaarten.com/uploads/1/3/2/7/132740398/6477239.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/97880568845.pdf
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/91810798409.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/37794264384.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/nisatale.pdf
    • https://cdn.shopify.com/s/files/1/0429/1906/7815/files/sumoruledidaluteka.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/chemistry_a_molecular_approach.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/kovaravejosivoverozita.pdf
    • https://cdn.shopify.com/s/files/1/0431/1495/4908/files/65568659024.pdf
    • https://cdn.shopify.com/s/files/1/0434/7484/5858/files/zifirale.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/nowuvanegumudumifiw.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_off000068fe.bin
9f8a9151aa29a0eb2472e0b8e8d9ff065249273405daa1635d721602b0cc2e7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FE 5184 bytes
font_01_sfnt_off00007ab7.bin
dbafd20e04262922937dd220a3e99f2089d32ff7c0e716ca8a50c9e0ba9cb99d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB7 10520 bytes