Malicious PDF — malware analysis report

Static analysis result for SHA-256 3719e7a57c8568f1…

MALICIOUS

PDF

48.5 KB Created: 2020-08-31 04:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b51b1a536f4fd156be8c4aa406d5a638 SHA-1: a8b8cf093d1fd580ee5cca0b5fa29ccfa5b5783d SHA-256: 3719e7a57c8568f1dd7d4acffe32c5941f57d04bcc92a753df31cb659bad087a
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to a redirector service. The document body contains text related to 'how to play munchkin' and a URL that leads to a malicious redirector. The presence of numerous links, including those to a redirector, suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/wix?keyword=how+to+play+munchkin
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/understanding_electrocardiography.pdf
    • https://cdn.shopify.com/s/files/1/0459/9735/9261/files/assets_and_liabilities_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0441/1500/1496/files/jukutiboleruripadajaleso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/40620834240.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2534/files/us_constitution_amendments.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3687/files/game_ps2_untuk_android_tanpa_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3607/files/fatelojenadaron.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1237/files/86099977785.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/fibonacci_sequence_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/0202/6393/files/64587952011.pdf
    • https://cdn.shopify.com/s/files/1/0451/9510/0311/files/fupokibixuruteduwu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/53352534040.pdf
    • https://cdn.shopify.com/s/files/1/0432/6994/7555/files/roliris.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5961/files/english_worksheets_capital_letters_and_full_stops.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/sides.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_off00007342.bin
6176d79ef54c377095853a08ae0ae0fd4a78fdac4f379cec8fff48c40cc1e743
pdf-font-stream PDF embedded font (sfnt) at offset 0x7342 4880 bytes
font_01_sfnt_off000083b4.bin
d45c228b35d0725dedd6c7599bb52ddd786be29cf44d8d3acf4c06b620297cf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x83B4 10308 bytes
font_02_sfnt_off0000a715.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xA715 4324 bytes