Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b468c6d7c182971…

MALICIOUS

PDF

42.4 KB Created: 2020-08-23 01:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebca918c16ee7cd5ffd3434e5a4b4abb SHA-1: 5ab0f129f87c08ce642eb6c468b1ce288943a0ff SHA-256: 2b468c6d7c182971576aefe9d610e92b688eccf54310a5188df244d9a7b438d5
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, ttraff.ru. The document body, though partially corrupted, contains keywords related to the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=manual+blister+packaging+machine+for+sale
    • http://lukalito.de-benedetti.com/uploads/1/3/1/4/131406069/senufaro.pdf
    • http://dipabu.transformanimaltraining.com/uploads/1/3/1/3/131398368/1369032.pdf
    • https://cdn.shopify.com/s/files/1/0436/9465/3594/files/nvidia_jetson_tx2_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62386903812.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/dumbledore_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/55802539567.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/mifesez.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/b_pharmacy_syllabus_bamu_university.pdf
    • https://cdn.shopify.com/s/files/1/0432/3196/9438/files/anatomy_and_physiology_directional_terms.pdf
    • https://cdn.shopify.com/s/files/1/0430/3853/9927/files/12308225040.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/jordan_cc_sims_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5465/files/xufutowemaga.pdf
    • https://cdn.shopify.com/s/files/1/0450/1841/5254/files/63536712951.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/28343963723.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6295/files/patogenesis_anemia_megaloblastik.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_off000067ce.bin
007bd1069a8208d6b2fc78d09372646fbe9af4c19cb3cbaf602d54b3dd9f716a
pdf-font-stream PDF embedded font (sfnt) at offset 0x67CE 5640 bytes
font_01_sfnt_off00007acd.bin
bb9698fb7b3d77d3b1b4f8ce86a1df170c3f9c31b764b77e83807b62c529a676
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACD 9980 bytes