Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cf98a0c289066c…

MALICIOUS

PDF

43.3 KB Created: 2020-08-28 09:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58135a160db1a24115546645c3e57628 SHA-1: 4b7cbff682c2ddca72387ff3f90ff3508c36bed5 SHA-256: c6cf98a0c289066cbd09551b47f861d7ca722bc864007b168600a95f28edc2e2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=ejercicios+solubilidad+3o+eso+resuel'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com, suggesting an attempt to obscure the malicious destination. The document body itself contains garbled text but includes the malicious URL and references to educational material, likely a lure.

Heuristics 3

  • 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.
  • 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=ejercicios+solubilidad+3o+eso+resuel
    • http://files.gardentherapybliss.ca/uploads/1/3/0/9/130969075/97c64461264c2dd.pdf
    • http://xojufofub.sitdownwithavet.com/uploads/1/3/2/8/132814900/2993319.pdf
    • http://mujek.versaillesfourthofjuly.com/uploads/1/3/1/4/131482962/11065356076b.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/7595429870.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70838758317.pdf
    • https://cdn.shopify.com/s/files/1/0456/8360/5663/files/bioenergetica_dr_alexander_lowen.pdf
    • https://cdn.shopify.com/s/files/1/0435/5663/4787/files/arabesque_no_1_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0462/1287/4394/files/anatomy_and_physiology_study_guide_chapter_6.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/treatment_of_status_asthmaticus.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/easy_learning_mandarin_chinese_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/jirufuvakaka.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/tezolizavo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/bar_graph_and_line_graph_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/sezotosumexer.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/roguwemuwodavujobex.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/sample_of_formal_letter_writing.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_off00005270.bin
1617db9ecd004f1a0106ec40bef42e768eecf804d88502ff55e581a74aa6ff33
pdf-font-stream PDF embedded font (sfnt) at offset 0x5270 5268 bytes
font_01_sfnt_off0000645e.bin
c88b86f0b46cc1ed3e85ea1c1155c68a90b2a1bd33ebacc332b56703ae209823
pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 11132 bytes
font_02_sfnt_off000088a7.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0x88A7 16312 bytes