Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2f02dc06d89aed…

MALICIOUS

PDF

51.1 KB Created: 2020-08-13 21:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3d1e8d53ca4d75b7c4c89ae944fda62 SHA-1: 61ae003d9b005ab5f0a7f20cdbb1b58a416cd557 SHA-256: 8e2f02dc06d89aed191567d4d8897045c7860d5f9cbe59e98ebcbc3312ad5062
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting the document's primary purpose is to drive traffic to malicious infrastructure. 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=fraction+division+word+problems+worksheets
    • http://files.joellesolomon.com/uploads/1/3/1/4/131438570/donelego.pdf
    • http://todipigex.louisianaalligators.com/uploads/1/3/2/3/132302955/b0e22.pdf
    • http://files.jeffchandlercreative.com/uploads/1/3/1/3/131381480/94508fe99fa.pdf
    • http://files.alexandriatalley.com/uploads/1/3/0/7/130740257/lixosilowilare_wolop_tuwosesipezisu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/boboli_gardens_map.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3638/files/1_99_agility.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/alter_ego_plus_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8577/files/15831263415.pdf
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/rexufepelaxivaganibusefir.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9605/files/samsung_mtp_driver.pdf
    • https://cdn.shopify.com/s/files/1/0448/2488/7456/files/modul_belajar_photoshop_untuk_pemula.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/6156662124.pdf
    • https://cdn.shopify.com/s/files/1/0439/4477/1739/files/84857033550.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/loop_after_effects_expression.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/judexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/rebirosujapowid.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069a5.bin
5c3d73722c8139672dfae93529493d5d06138afcb1ff07f4816dd162187ff469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69A5 5624 bytes
font_01_sfnt_off00007ca7.bin
16e66dec667749330bc6ba08d7aa3ae0f6664bc95b91590cc900163361b62c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA7 11876 bytes
font_02_sfnt_off0000a5a6.bin
f9dd5674d7478a81870e4b5faf41e8383b13dfd00eacdb462f2b6909c91440c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A6 17316 bytes

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