Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e546ad3128f6b0…

MALICIOUS

PDF

33.4 KB Created: 2020-08-05 01:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5ffd68fdf5e2f5b3f2e01eaf58b4cf6 SHA-1: 38887e33227a43603fa259a07673c3e1533b2d6e SHA-256: 16e546ad3128f6b0367abe7a648f924d26f42a888cb8256bf07e81a9c72cb70b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate academic resources but ultimately redirect to the malicious domain ttraff.com. This technique is commonly used to distribute malware or lead users to phishing sites. The ML classifier also strongly indicated maliciousness.

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=autonomous+intelligent+vehicles+theory+algorithms+and+implementation+pdf
    • http://files.85groupphotography.org/uploads/1/3/1/8/131856917/4203350.pdf
    • http://files.madxllc.com/uploads/1/3/0/9/130969146/8852600.pdf
    • http://sedijog.scorpiontv.us/uploads/1/3/0/7/130775422/bababinuzi.pdf
    • http://files.ffijones.com/uploads/1/3/0/7/130776312/fuwepikagizadad.pdf
    • http://files.glitterbartenders.com/uploads/1/3/2/6/132681749/3826409.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1751/0818/files/50337388852.pdf
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/76237678816.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61053474184.pdf
    • https://cdn.shopify.com/s/files/1/0440/6181/9045/files/bastien_piano_basics_primer_level_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/61267675832.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/4d_cards_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5656/files/autoestima_libro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/wabusix.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/3292973084.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/fubezikemulelub.pdf
    • https://cdn.shopify.com/s/files/1/0434/7461/6472/files/vitodelas.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_off00004406.bin
c667e5f229fe0d63262bed00096ef972fa60a8be1fc72cc2f07736615e60161d
pdf-font-stream PDF embedded font (sfnt) at offset 0x4406 5720 bytes
font_01_sfnt_off0000575e.bin
203a6653ab47c8a0e2943deb8ebe4039cedbc83d8396cba568b74304b0e02e58
pdf-font-stream PDF embedded font (sfnt) at offset 0x575E 9616 bytes