Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3652bbd78f3328…

MALICIOUS

PDF

65.8 KB Created: 2020-08-08 21:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24c302913c90d23ddd2840409d554fbd SHA-1: debfb0841b7bcfef3665afb72bcd0b555319e727 SHA-256: 8f3652bbd78f3328def86c5a6269b9c808df57eeb9a461aea53a3d7d7a66d2f8
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.com', suggest a redirection to potentially malicious content. The document body, though heavily corrupted, contains references to the 'ttraff.com' URL and other Shopify-hosted PDF files, indicating a likely attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=arabic+calligraphy+letters+pdf
    • http://files.globallearning-cuba.com/uploads/1/3/1/4/131453969/a0acc61ca8.pdf
    • http://files.cocreativ.net/uploads/1/3/2/6/132696249/rujibemepodinig-fifokuvo.pdf
    • http://xagupef.centralcaliforniaembrace.com/uploads/1/3/0/7/130776791/2658403.pdf
    • http://files.artlovelifestyle.com/uploads/1/3/0/7/130776493/4640512.pdf
    • http://files.ssjohnpaulfaithformation.org/uploads/1/3/1/6/131607029/difitorufe-kopoxelurerajof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zimupumunilojoduwa.pdf
    • https://cdn.shopify.com/s/files/1/0436/9275/3049/files/45999921871.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/pimutizodidi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/4390538336.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/sociologia_da_educao_alberto_tosi.pdf
    • https://cdn.shopify.com/s/files/1/0447/3529/9738/files/ncert_class_12_biology_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9481/9484/files/wijopuwexerira.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/14866588433.pdf
    • https://cdn.shopify.com/s/files/1/0434/1891/0876/files/osrs_dwarf_cannon.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/fakijum.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_off0000b30b.bin
03d44ed493d1ee2fcf8163cd832efa3c951c906218c360ffba65bef9a23261b5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB30B 33076 bytes
font_00_sfnt_off0000769b.bin
b8ed3f010cc1879eb81b5740902ddc0be03818bc63a81f580f2cb881b058ca6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 5220 bytes
font_01_sfnt_off00008870.bin
80997202fbd31e60988b896b68b112350f1fd75bc176e0eb34d2701ef9f8ce75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8870 14168 bytes
font_03_sfnt_off0000ebc1.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 4324 bytes

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