Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb01ef47e19e854…

MALICIOUS

PDF

50.1 KB Created: 2020-08-22 21:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86a203b62681e16ee992ee2d95120bd0 SHA-1: 0e243196dce09c8e19fa5fbc6644641e0c86876b SHA-256: ccb01ef47e19e8540fff3b7ad2a08011176fb2a6fd5da0b43ffb7f42a6163975
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used to redirect users to malicious sites. One critical heuristic firing specifically flagged a link to a known malicious redirector infrastructure. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document but rather a container for malicious links.

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/pify?keyword=languidez+de+alfonsina+storni
    • http://riwomat.eamstudio.com/uploads/1/3/2/6/132681218/lotukuraliwobitix.pdf
    • http://jofufakov.dhsdrama.com/uploads/1/3/2/7/132740249/wekimolagusi-dazinoleko.pdf
    • http://durilusok.missinternationalaustralia.com.au/uploads/1/3/1/4/131406592/0e5a1.pdf
    • http://files.philgoldmanphotography.com/uploads/1/3/1/8/131856567/770214.pdf
    • http://nogudub.linipik.net/uploads/1/3/0/9/130969572/37025.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/47287752677.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/vivid_verbs_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/2041/8198/files/flip_book_template_after_effects.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/todilirim.pdf
    • https://cdn.shopify.com/s/files/1/0452/3799/3629/files/anaconda_python_32_bit_windows.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/75930931697.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/terapia_genica.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/kebifevodola.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/kickboxing_workout.pdf
    • https://cdn.shopify.com/s/files/1/0432/7555/0876/files/77662493248.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/50359204577.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/rekizuwopipese.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_off00007972.bin
0531116623f95a63e2d35ff368da9432d14ba7132705b40e1264f32803ff0d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7972 4948 bytes
font_01_sfnt_off00008a5c.bin
dbfe1ce864a6b911c712ee2f093456e45133eb225d7c5a27a629a055db22b919
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5C 10220 bytes
font_02_sfnt_off0000ad2f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2F 4324 bytes