Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca5552607bc258a…

MALICIOUS

PDF

50.5 KB Created: 2020-08-06 22:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce17179684a2c7bb032e7ca2f27fc5bd SHA-1: b0d853316ad1b8ea83610ecaeca5d1c43ace9655 SHA-256: bca5552607bc258a7b0ae8f488cf753501353fbf34d21ce7bb62ec86b61fe984
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical heuristic firing for a malicious redirector, indicating a phishing or scam attempt. The embedded URL `https://ttraff.cc/pify?keyword=exercise+plan+for+weight+loss+pdf` is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains text related to an exercise plan, reinforcing the lure.

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.cc/pify?keyword=exercise+plan+for+weight+loss+pdf
    • http://files.street-sharp.com/uploads/1/3/2/6/132695306/5632864.pdf
    • http://toratuz.holdinghandsandhearts.com/uploads/1/3/2/3/132303382/2b5b85ca12.pdf
    • http://files.beitnachum.org/uploads/1/3/1/8/131856666/digopujopepirok_bujuke.pdf
    • http://files.healthyfoundations.co/uploads/1/3/0/7/130738614/rumasisive.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/9180303417.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/boundary_element_method_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/wesoxiwemazodina.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/19000000351.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/28658475371.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/jidejuxupaselezukavivob.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/61647817954.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/kutegavuraxuxa.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/vce_to_convert_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6896/5532/files/rinopuluginifamugesexisa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/folenon.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/33526873372.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2184/files/mod_menu_gta_5_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/conjuntivitis_bacteriana_recien_nacido.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/1/0438/1281/5008/files/vce_to_convert_onlin

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008694.bin
f5a6a78036561dd1248589eef93f7521ae151da354b330b3257255fd235ebd05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8694 5536 bytes
font_01_sfnt_off0000997f.bin
0cca0e4b9b671c22fc06510980b684a99818a922285be5d7de7099beaddcff80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x997F 10288 bytes

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