Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92e6fc85f46d365…

MALICIOUS

PDF

46.8 KB Created: 2020-09-01 09:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d6340774d074c72d4cae1d1b08a274 SHA-1: f1147e2a7abdf6f172994f743dff2aaac0f5c017 SHA-256: f92e6fc85f46d3658284c2654c89264e13526398d5379bdae31bccb168e9e197
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, https://ttraff.club/pify?keyword=answering+a+question+with+a+question+term, is directly linked to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt 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.club/pify?keyword=answering+a+question+with+a+question+term
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/58224453095.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5645/files/cascaded_multilevel_inverter.pdf
    • https://cdn.shopify.com/s/files/1/0435/4598/5179/files/98826175366.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/binekabuforexaxozoko.pdf
    • https://cdn.shopify.com/s/files/1/0434/0423/0805/files/89553980432.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/78933078634.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/pulowejuju.pdf
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/antrenmanlarla_matematik_tamam_zml_soru_bankas.pdf
    • https://cdn.shopify.com/s/files/1/0435/1511/7727/files/adverb_clause_of_result.pdf
    • https://cdn.shopify.com/s/files/1/0436/2492/3298/files/77267566460.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/89794520946.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/bangalore_to_mysore_train_time_table.pdf
    • https://cdn.shopify.com/s/files/1/0437/0045/3541/files/93598834926.pdf
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/life_skills_reading_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/the_cell_cycle_and_checkpoints_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1503/7343/files/adobe_scan_tarayc_ocr.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_off000062a2.bin
ca9b96998d0273e9969d3a680365b7f14cd950550ffff9618d21a156027b4a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 5276 bytes
font_01_sfnt_off00007479.bin
6e925f7c341b4122f31c6492dd9f400194b0804acca14a9b8048c262b3bf7f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7479 10872 bytes
font_02_sfnt_off000098e0.bin
e89d3061bbb618abf2243d37f45bfd24be500ec4012ea469dca3856f2c1c6d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E0 16176 bytes

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