Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b5e91233f18a82…

MALICIOUS

PDF

41.8 KB Created: 2020-08-14 01:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a512d74af36aec3629204ba838878703 SHA-1: 068a0f85d325a0fc6c585067b7d35e2972a66c90 SHA-256: 79b5e91233f18a827be47df0f28af2ede26660edb1f248e5975d8fe63c3dd774
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The document body contains a URL that appears to be a lure for a movie download, which redirects to the malicious ttraff.ru domain. This suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=aligarh+full+hd+movie++2016
    • http://files.nofearlife.org/uploads/1/3/1/4/131453451/sekipilabesuj_xefewip_dafamofoveza_lefupe.pdf
    • http://files.eastcoastcoachingandconsulting.ca/uploads/1/3/0/8/130813736/9318012.pdf
    • http://rowuzi.nccsdonline.org/uploads/1/3/1/4/131453574/555456.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/bopekotedupilovudomusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/fumaximifafaretijelusit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6499/1649/files/algebra_1_system_of_equations_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/bonebusijade.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/discord_rules_copy_paste.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/96210168868.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2137/files/xifuworebasu.pdf
    • https://cdn.shopify.com/s/files/1/0446/6461/9171/files/jeep_certified_pre_owned_warranty.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/king_of_the_ring_1994.pdf
    • https://cdn.shopify.com/s/files/1/0440/7227/2037/files/osrs_f2p_magic_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/2770338499.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/86579964148.pdf
    • https://cdn.shopify.com/s/files/1/0434/8670/7876/files/anne_of_green_gables_musical_score.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_off0000556f.bin
69fe5e6ba6e5692dfb2ff72cf15c9da4ec274696c925f803e8a59e989a588a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x556F 4036 bytes
font_01_sfnt_off000063ae.bin
c965611a283b5c03e5ba5e0f7e459b07fce451917cfa5a229c1a32485a1f0594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AE 5672 bytes
font_02_sfnt_off000076e6.bin
5b097f5de933e164c683b6b9cb79b6d1799c24a0ad82800f8fe6089abb698c3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 10312 bytes

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