Malicious PDF — malware analysis report

Static analysis result for SHA-256 d318d6a1d9ff8661…

MALICIOUS

PDF

41.6 KB Created: 2020-08-10 20:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c7b3bb3cba9c02144f472b018512415 SHA-1: 257fed4155a64f106ddcc6c14730f5ac2570917e SHA-256: d318d6a1d9ff86614fff89db379899a1090107e8ff713936af16bd12356e3cde
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a workout schedule that redirects to a known malicious URL (ttraff.com). The document also exhibits characteristics of a link farm, with numerous embedded links pointing to various PDF files, many hosted on Shopify. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains multiple external links, suggesting a phishing or redirection attempt.

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/pify?keyword=muscle+gain+workout+schedule+pdf
    • http://files.hiddenoakshoa.org/uploads/1/3/1/6/131606035/58f94.pdf
    • http://files.nikofalltrades.es/uploads/1/3/1/1/131164431/gagulozonudexir.pdf
    • http://files.earthquakeearlyalert.com/uploads/1/3/0/7/130775102/jawikivaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/barepezazujoxodurovid.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/xadenajopigoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/andrs_caicedo_libros.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/makovaxosevofasan.pdf
    • https://cdn.shopify.com/s/files/1/0437/8741/9805/files/fe_reference_handbook_9._4.pdf
    • https://cdn.shopify.com/s/files/1/0438/0036/3170/files/76833544136.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45397061855.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/dijagozasuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/93908558961.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/c_header_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/0492/7905/files/fotabijupax.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/59186710983.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/62844384520.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_off000064d7.bin
1fcc93e05a5187a2d5f933f3c481d1606ffcb717cc8fddfdd6dea2af95695067
pdf-font-stream PDF embedded font (sfnt) at offset 0x64D7 5580 bytes
font_01_sfnt_off000077ee.bin
1be579181a2e5ac338329c367937778bed72d389f43eb983d8cbaa62a0f3dced
pdf-font-stream PDF embedded font (sfnt) at offset 0x77EE 9868 bytes