Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11051cf568c6919…

MALICIOUS

PDF

45.0 KB Created: 2020-08-07 01:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ec9bcf279b66cafe7cf848bbd004db6 SHA-1: d2e5382466fdd0678fc0a1893fe9791d4dbb0b81 SHA-256: e11051cf568c6919761f7e3eeb48b7382534605b8fb836798d631855de119956
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers this heuristic. The primary purpose appears to be redirecting users to malicious infrastructure, potentially for phishing or malware distribution.

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.com/pify?keyword=hypospadias+and+epispadias+pdf
    • http://files.graffitispotbengals.com/uploads/1/3/0/7/130775261/7912034.pdf
    • http://files.nasreenyazdani.com/uploads/1/3/1/8/131856195/durijaxe.pdf
    • http://files.nexterawrestling.net/uploads/1/3/0/8/130813111/zejewajebolasi.pdf
    • http://files.prettylittlenurse.com/uploads/1/3/1/6/131607310/412073bfc.pdf
    • http://files.rjs-smokehouse.com/uploads/1/3/1/4/131437079/bobud-pupuvuv.pdf
    • https://cdn.shopify.com/s/files/1/0453/8574/4552/files/digital_height_gauge.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/1314138910.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/23493725146.pdf
    • https://cdn.shopify.com/s/files/1/0439/2920/6939/files/zudipexewepibu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/66571826194.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/free_astrology_books_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/jireja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenixuraxolitater.pdf
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/gabion_retaining_wall.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/rabexigoze.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/kixevakudabunulagewit.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007342.bin
9b7741451b493471054f47cf690d9820cdb30150ad38e8ac4fd212072541976d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7342 4972 bytes
font_01_sfnt_off00008448.bin
0a2bb10aab8327282ecfc7429a65adf970acc185c60c6f9bd698ed4bd7bfe250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8448 10236 bytes

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