Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0de3273498297b…

MALICIOUS

PDF

39.4 KB Created: 2020-08-25 03:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc7ea30de77dd344ea76e26d16c1e950 SHA-1: 97ae4ee509682b3f406e709f108c6b31c00a6c6a SHA-256: 2e0de3273498297b017755b55158a962fe8b95018288813c568d1e6e3b510412
152 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to a known malicious URL, indicating a phishing or malware distribution attempt. The document body itself is heavily obfuscated but contains the primary malicious URL, suggesting the intent is to redirect the user to a site that likely hosts further malicious content or attempts to phish credentials. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=consumer+credit+risk+management+pdf
    • http://files.acollinsedu.com/uploads/1/3/1/3/131384127/2fec1.pdf
    • http://files.rosieraestoffee.com/uploads/1/3/1/6/131606291/dowir.pdf
    • http://files.reusinbysusan.com/uploads/1/3/0/7/130775784/vejuwekikezuke.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/36401077031.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/wupawalevuketaradixak.pdf
    • https://cdn.shopify.com/s/files/1/0438/8667/4088/files/bobumibawisasuniwitasivus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/verizon_extended_network.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/google_chrome_terbaru_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/11239218903.pdf
    • https://cdn.shopify.com/s/files/1/0463/0839/3122/files/delomonovifurid.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/kadurevupa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/43603034081.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/4363905957.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_off00005c3b.bin
fc718ae432f7d441d8d9ca0714270a26f842c0cbc2bd8b4c845404198aa47fbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3B 5412 bytes
font_01_sfnt_off00006e8d.bin
06e3d557c8f7fdd70d0d0fb809cbc13c74c454b8c301a6a63a06695356bda88a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8D 10084 bytes