Malicious PDF — malware analysis report

Static analysis result for SHA-256 922ba8ce68cdceb3…

MALICIOUS

PDF

60.4 KB Created: 2020-08-20 07:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20cbf253f4b6b6fc6f48d0a54b8982b1 SHA-1: de8899144ab42fab6393838a126a9f4c48acd5c4 SHA-256: 922ba8ce68cdceb3b0f91d81024c659d71c1bc088fbcb16039f84403b598bb98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is embedded within the document body, disguised as a 'Mass effect 2 squad members guide'. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation. The ML classifier strongly indicates 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=mass+effect+2+squad+members+guide
    • http://files.seedingreciprocity.com/uploads/1/3/1/6/131637658/buwudusas_bilidavezegav.pdf
    • http://tuzakibar.astuntech.com/uploads/1/3/1/0/131070374/kutopol-kilurev-mazupafotijovo-joketowami.pdf
    • http://files.janetan.net/uploads/1/3/1/4/131406288/xosakelarusopeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/22937715193.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2536/files/re_install_direct_x.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/b_l_theraja_electrical_technology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/vintage_wedding_border_frame_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/1987/7024/files/backyard_baseball_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/children_s_tylenol_dosing.pdf
    • https://cdn.shopify.com/s/files/1/0433/2974/9145/files/75930676132.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5316/files/toefl_reading_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/9610/5375/files/goodrich_and_tamassia_algorithm_design_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0439/6092/6366/files/alchemist_code_chloe_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/56604835873.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9783/files/bts_love_yourself_answer_l.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3576/files/begin_the_beguine_clarinet.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae4a.bin
5bb4d3e459892cea8b2c8c0f8be27570738dcc66e2e31b24bddc5e1670a0f048		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4A 5712 bytes
font_01_sfnt_off0000c197.bin
48c9c031353e3892336456bbb3423eea4b574b7a61c83ac78c49834924dbde81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC197 10184 bytes

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