Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fb133b81e46b20…

MALICIOUS

PDF

36.6 KB Created: 2020-08-18 21:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22a90c5081b66d7902be4c726f0db14b SHA-1: 640c3dbcb7789fb8b10528c98b325b00da4aff23 SHA-256: 08fb133b81e46b20bb5b88d7716f9ed139a0a6b73c2ecc14cea73a84eedb53f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF 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 embedded links, many of which are to benign Shopify URLs but one critical link is to known malicious infrastructure. The document body contains obfuscated text and a reference to 'Second line app apk', suggesting a lure for a potentially malicious application download.

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=second+line+app+apk
    • http://files.thenavigatorprogram.org/uploads/1/3/1/3/131383651/198838.pdf
    • http://files.roboticsuwm.com/uploads/1/3/2/6/132682790/1a0c962.pdf
    • http://vonodeka.yellowmarigold.com/uploads/1/3/0/7/130775403/3468311.pdf
    • http://files.thelawnandgardengeek.com/uploads/1/3/1/3/131381976/2726fe7.pdf
    • http://files.ccitechnologies.net/uploads/1/3/0/8/130874240/4e2566ceeec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/access_hardware_supply.pdf
    • https://cdn.shopify.com/s/files/1/0437/0723/6503/files/python_3d_plot.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/siwufuzidamero.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0451/7157/2885/files/askep_penyakit_jantung_koroner_aplikasi_nanda_nic_noc.pdf
    • https://cdn.shopify.com/s/files/1/0452/1564/5856/files/x_l_file_khng_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0447/2769/7561/files/avatar_the_last_airbender_movie_3gp.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/mapejil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004739.bin
d5b71635a295cee9b8d449186c6406b8dc8f7b4425985487863c9ef18d423c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4739 4668 bytes
font_01_sfnt_off0000570e.bin
a1f4a4ee0714bab03ace954ad49da0861c7416d8f94db53ca3f766ef918ebed9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570E 9628 bytes
font_02_sfnt_off000077f7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F7 4324 bytes

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