Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09137756a921109…

MALICIOUS

PDF

44.8 KB Created: 2020-08-11 16:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88f7c429604757710a27b31eb9745218 SHA-1: 95e029d7f2646bf8b1831b6093f4a3d5f3d97667 SHA-256: f09137756a921109182e0c32b5262c0e635ac32d8787d74fecf373fc1da022d9
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the presence of numerous other PDF links, many hosted on Shopify. The document body, though partially corrupted, contains text related to a 'Biblia de estudio reina valera pdf gratis' and the redirector URL also contains a similar keyword, indicating a lure for free content. The primary malicious URL is https://ttraff.cc/pify?keyword=biblia+de+estudio+reina+valera+pdf+gratis, which likely leads to further malicious content.

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=biblia+de+estudio+reina+valera+pdf+gratis
    • http://vulatufam.multifunctionslab.com/uploads/1/3/1/4/131452883/3131779.pdf
    • http://files.gayedesigns.com/uploads/1/3/1/8/131856723/javoxefu_jenuse_lapekikokebi_vulolugisoxegud.pdf
    • http://files.mnjrc.com/uploads/1/3/1/0/131069978/naluzoke-kadarovet-metinuso-davujawutu.pdf
    • http://files.wholistichelp.com/uploads/1/3/2/3/132302859/3404040.pdf
    • https://cdn.shopify.com/s/files/1/0437/9590/6721/files/refageketulamifawe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2421/9293/files/12361674496.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/1019767848.pdf
    • https://cdn.shopify.com/s/files/1/0431/7455/9893/files/fafesopejokujapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/lusovirusodofanurijikako.pdf
    • https://cdn.shopify.com/s/files/1/0433/4937/7177/files/kujunosogafaxodobirusizi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/50414833304.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/vuvavasira.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/sivizediperozezek.pdf
    • https://cdn.shopify.com/s/files/1/0436/9242/5384/files/topozu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/telagexelapalerimi.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_off0000587f.bin
d4e37ff0b2d9c5d4df22490e26f36afd8d5ab04bdb7bae355b23e110215ef41e
pdf-font-stream PDF embedded font (sfnt) at offset 0x587F 5460 bytes
font_01_sfnt_off00006b1b.bin
7bb9502ff25f807f83a68dc986b60bfa176b9f9d8f5e7dfe39e2ab163bd32d77
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1B 10984 bytes
font_02_sfnt_off00008f2f.bin
c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2F 16092 bytes