Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e181b870cee1a1…

MALICIOUS

PDF

47.5 KB Created: 2020-08-18 13:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f905da8b3a152398996a5ba133b41b8 SHA-1: 44b2ac7563ab2d6ca5dd8d9e72d96705fefc9414 SHA-256: d0e181b870cee1a1778bc2a66d909884b9868eb99b81e87bfe57837808d019df
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to a known malicious redirector, ttraff.cc. It also exhibits a PDF link farm heuristic, suggesting a large number of outbound links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware-hosting site.

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=acr+bi+rads+atlas+pdf
    • http://donalaz.musicaltheatreuniversity.com/uploads/1/3/1/8/131871390/7ae76.pdf
    • http://files.jessielavoie.com/uploads/1/3/0/8/130814219/jotona.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48465164240.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/20027166093.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/latitude_e7470_specs.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2564/files/viluserid.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/reliability_test_in_spss.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/google_sheets_how_to_freeze_multiple_rows.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sekokejeninidifowabofu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/xudavuzevetozoseb.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/xasutozoxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6252/4069/files/pink_floyd_comfortably_numb_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xuvoba.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_off00006e0d.bin
f37b2c9f7b4f0cce2c7fb374028c93689c3b72835dcec75bf661b04b52e3b482
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0D 4732 bytes
font_01_sfnt_off00007e1f.bin
ec362e034b9950225cc4ddbbc0b700703b5b5f70eb32a1d85357bbdda2f4f801
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1F 10472 bytes
font_02_sfnt_off0000a1e0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E0 4324 bytes