Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86d924f30bf10e4…

MALICIOUS

PDF

68.8 KB Created: 2020-08-14 09:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6a63440dc21e847f4a4182f7664d50 SHA-1: ed6e9491e86b2bd8df58c21ec57fcf486cb99c97 SHA-256: a86d924f30bf10e4f006c3d8286ac37dd81cfabc6790c30a2a155906d8488cb9
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=abs+plastic+sheet+1%252F+8'. This indicates an attempt to lure the user to a malicious site. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or content distribution network used for hosting malicious or deceptive content. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=abs+plastic+sheet+1%252F+8
    • http://files.moralehemp.com/uploads/1/3/1/3/131398221/gofijofiwom-zafov-bojitatazemavig-tubapuvava.pdf
    • http://files.chopshopwrestling.com/uploads/1/3/2/7/132740845/lewapaterasas.pdf
    • http://files.fridart.org/uploads/1/3/0/7/130739778/3170504.pdf
    • https://cdn.shopify.com/s/files/1/0429/7018/5879/files/54703274959.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/ronodinewinonutoxunoloz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/wigifewufasazuzaxuvuzanes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/90139715434.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/91428115041.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/bv_ramana_higher_engineering_mathematics_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/rivikofaxuzikosezafo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/vosomajurodinusuvudawo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/agenda_escolar_para_imprimir_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/87068162333.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1079/files/mosi_miso_full_form.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000ec11.bin
76819b0bd40e5ae582d447e6323c8bf6144947643d6d9c07fd185474584624c1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEC11 17788 bytes
font_00_sfnt_off0000876e.bin
8502f34ecf9e8cac682affcb1ea0b626044c38357b7e70464299b04bb0cdfc1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x876E 7816 bytes
font_01_sfnt_off0000a1e1.bin
fd33137c7daee36fd14c49ad49f12891429df2cd8822dcf00aece562fc708c33
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E1 5336 bytes
font_02_sfnt_off0000b404.bin
55868678b2ba9d5f88355d08dcc21797c1561a76f60c02f4de434524267567ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xB404 18588 bytes