Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1603eb5e7d6325d…

MALICIOUS

PDF

61.6 KB Created: 2020-08-27 23:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1062ea1e080ec95e2ca204b17965ff1e SHA-1: a9542c35ce79ceb3c1091498b26955f929f37061 SHA-256: d1603eb5e7d6325d2c7567023be912af217f7f5805cc4c93c25d4b3cc0ee7df0
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links, many hosted on 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. The embedded document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to lure the user to a malicious 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.com/pify?keyword=vladimir+ashkenazy+rachmaninov+piano+concerto+no+3
    • http://latiki.eating-normal.com/uploads/1/3/1/3/131382486/gukuxiwabagal-lojen.pdf
    • http://files.ptcwyo.com/uploads/1/3/2/6/132683264/fezikovegil_lesinezejidobaw_nokufonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/apple_pie_viral_app.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/vuranufimebemifepi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/bupagitubuzeretalemija.pdf
    • https://cdn.shopify.com/s/files/1/0469/3137/8331/files/congruent_shapes_definition.pdf
    • https://cdn.shopify.com/s/files/1/0464/8042/5112/files/90173191292.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9273/files/bemifejenelujikolobig.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/pewugisawonuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/rinarurepawasurute.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/vibitadebajor.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/bewegusowam.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/87516667681.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/
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d70.bin
506465dda9648b7370fc0422ccfba4ce650d9659cda9837f115a7fca6ede589a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9D70 5720 bytes
font_01_sfnt_off0000b0d0.bin
9edc788b1ea789cb012c22c04ce66c43884086e1510e8f5ff7dbb7384c511d02
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D0 10076 bytes
font_02_sfnt_off0000d389.bin
73e2bae015806fcbcea00a5e77fef36cf57312733aebee32ba98308b5ce41d75
pdf-font-stream PDF embedded font (sfnt) at offset 0xD389 16120 bytes