Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc8783ad4e31892…

MALICIOUS

PDF

49.4 KB Created: 2020-08-14 17:39:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e5bdb0156b2129317a0fd0b71728ce SHA-1: 41e8321e0c96532300a0e283b0f7dda5cbf27741 SHA-256: 3bc8783ad4e318920e43328752f81ce8e7e6920d30721d5a4290cc88c6c4afb8
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=climate+change+report+2019+pdf'. This URL is embedded within the document body, suggesting a lure to trick users into clicking it. The document also contains a PDF link farm heuristic, indicating it hosts numerous external links, many of which point to Shopify domains. The primary malicious URL is the most critical IOC.

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=climate+change+report+2019+pdf
    • http://xefefufen.bhmblog.com/uploads/1/3/1/4/131406515/fedowepakes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0767/1453/files/fv_almelo_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/essay_on_teachers_day_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/delobizijogipujo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/7621020125.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/clinical_virology_manual_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/list_of_engineering_colleges_in_bangalore_under_vtu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/sneakerdog_s_phases_of_mitosis_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/goluwarikozixewigekuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/10236742277.pdf
    • https://cdn.shopify.com/s/files/1/0438/0524/5597/files/tutibakajamulatubip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.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_off000072cf.bin
d3595fd75d1903aaa723ac51e90238ed443a56405ae21b0ecb3aac529187a5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CF 5684 bytes
font_01_sfnt_off000085f4.bin
5ec59fc6002c57697cee03dc2577e0e7ec2a7079d27bec0778b433cf4db1c2d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F4 10764 bytes
font_02_sfnt_off0000aac1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC1 4324 bytes

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