Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7d9de718100598…

MALICIOUS

PDF

50.7 KB Created: 2020-08-13 23:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159c1e7c283e1e972ecf347c7070acfa SHA-1: 1b85bfb536da1e6ed699bbc0846005fef93a7a29 SHA-256: db7d9de7181005987438ab962bc1384dc6713837c4bd05f01d0c9fa2e62da2ce
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, likely intended to trick the user into downloading malware or visiting a phishing site. The document body and embedded links suggest a lure related to downloading a movie, which is a common social engineering tactic. 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=maurice+1987+full+movie
    • http://buxot.spinna.org/uploads/1/3/0/7/130739826/3223263.pdf
    • http://files.shoppalomaclothing.com/uploads/1/3/1/4/131453560/7488cfe.pdf
    • http://jogut.finnegansfieldsgypsyhorses.com/uploads/1/3/0/7/130775818/8705483.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/anna_karenina_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/69112879463.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/lajobitiretutexonu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/physics_of_atoms_and_molecules_bransden_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/27210550623.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/99416418634.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/sanoriruzaxezimoxabite.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/rasukuxafuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0440/8279/0552/files/fuzam.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/nolumok.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_off0000876a.bin
49af17c42e8efb2dc93141edeb997847ece83a87339f589bce3d92ba8870c4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x876A 5396 bytes
font_01_sfnt_off000099cc.bin
9c907595ae44180a93a9651f5a76805b685bf21ae4ab9ff3606df6b00021406a
pdf-font-stream PDF embedded font (sfnt) at offset 0x99CC 10616 bytes