Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e96bc8ef444c02b…

MALICIOUS

PDF

33.3 KB Created: 2020-08-14 23:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a941474ab3291b660c2ba4464a2edd9 SHA-1: 9a5f2285651bc45c5fcd5839d6bb4146d83afaef SHA-256: 5e96bc8ef444c02bb87b9895fd53d5b60e3cd1f3c71d83ba4750cd6310d10c59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, 'https://ttraff.cc/pify?keyword=atharvana+vedam+in+tamil+pdf', is identified as a malicious redirector. This suggests the document is designed to funnel users through a link farm to potentially malicious content.

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.cc/pify?keyword=atharvana+vedam+in+tamil+pdf
    • http://files.veenalifestyle.org/uploads/1/3/1/3/131380440/digebinosol_patezid.pdf
    • http://mujuso.tennisschule-khablo.com/uploads/1/3/2/8/132814930/wiwiwoji_wiretojal_vafova.pdf
    • http://files.elisarichardson.com/uploads/1/3/1/8/131856757/4726771.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/62845329571.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7831/files/nowedominovatakimeras.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/68694194107.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/39169257492.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/nomuzifapadamimekirup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/76300524485.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/wabaxani.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/promissory_note_canada.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/leave_letter_to_class_teacher_for_absence.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004725.bin
db5dc7226f7792e707fad4fecfff0eb906b32f1e380d9b499cd391d24e6a22b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4725 5152 bytes
font_01_sfnt_off00005887.bin
ea1049d67c220f1775ed2ada1d39b4969e3a0ce6baa17d08bd951552308bb796
pdf-font-stream PDF embedded font (sfnt) at offset 0x5887 9560 bytes