Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea025b86c9b5090…

MALICIOUS

PDF

46.5 KB Created: 2020-08-22 04:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99189fc0fb3e608d8d011623c0f1c8e SHA-1: 732c555de6e444cfee12a79056f50585c34953e9 SHA-256: 7ea025b86c9b509055769eb1fa6dd2eaed12e49587469b8bd56a8d01e29c344a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that is disguised as a legitimate document. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the embedded URL confirm that the primary goal is to redirect the user to a malicious site. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to host multiple lures. 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.ru/pify?keyword=hypothyroidism+treatment+guidelines+pdf
    • http://files.mrandon.com/uploads/1/3/0/7/130776254/ribagijejebakufetafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/53997439837.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7709/files/54212360257.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/credit_card_information_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/vefizopenonexaz.pdf
    • https://cdn.shopify.com/s/files/1/0449/8548/3422/files/alain_touraine_livros.pdf
    • https://cdn.shopify.com/s/files/1/0429/5963/4591/files/72596251792.pdf
    • https://cdn.shopify.com/s/files/1/0434/4637/0471/files/fujovuwatuwudakenenesaxeb.pdf
    • https://cdn.shopify.com/s/files/1/0449/0782/3259/files/49425394545.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/93579037954.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/81051259250.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/pearson_mastering_physics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4847/files/98690019654.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_off00007380.bin
2a1462af3115ca6d42baf2af3d3e3006ef278941a58a77e76cf195b045d5209e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7380 5516 bytes
font_01_sfnt_off0000861f.bin
0d0b728706f1e941edf889e800e74caf599d5856f1731b20ae9a3c9d8d0d0bdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x861F 11996 bytes