Malicious PDF — malware analysis report

Static analysis result for SHA-256 26346781ebd004eb…

MALICIOUS

PDF

39.2 KB Created: 2020-08-17 14:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eceffc15da647251ca046117d91578ca SHA-1: 695311018f7669ceaff07429926a19f126efb6f3 SHA-256: 26346781ebd004eb0014d21407d10eaddce16af437e5d18a46a896f0a3979c40
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body and a critical heuristic indicate the lure is related to 'Alight motion versi beta'. The primary malicious URL identified is ttraff.com, which is used to redirect to other sites. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, which is flagged as a link farm.

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=alight+motion+versi+beta
    • http://bizew.epsilonomegatexas.org/uploads/1/3/1/4/131437812/2399365.pdf
    • http://defepo.muralhome.com/uploads/1/3/0/7/130739001/zejekuzinere-sezidevu-kuzikunosurik-libikex.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/arrays_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/27457991500.pdf
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/curriculum_development_in_language_teaching_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/23683078704.pdf
    • https://cdn.shopify.com/s/files/1/0434/0298/5626/files/academic_presentation_skills.pdf
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/96820090868.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/senidinidufusumasikuji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/22852818541.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/angiotensina_funcion.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/93653545964.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2983/files/mekotedoros.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6593/files/brukner_and_khan_clinical_sports_medicine_5th_edition.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_off00005c0e.bin
6b2e73043e2a840a6eca3c22e7302706a8e67722b9121d51df49f020766b4eb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0E 5288 bytes
font_01_sfnt_off00006de9.bin
cb92afd6d5327c9ebe40a509faa9c9c36a6c14fc24c153aa12fb0252af878e2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE9 10088 bytes