Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99b4b06527f98df…

MALICIOUS

PDF

86.2 KB Created: 2020-08-12 02:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4af5654542b6ab0a6d9afb64d5ccc39f SHA-1: 0c76d6fc2c5e27804256a7679380ddb99d2148f7 SHA-256: a99b4b06527f98dfd1ffe2cfd0e7440d59c1584b4d3488cf51fb6c341e46b1d4
120 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=khalifah+bani+abbasiyah+pdf. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or malware delivery.

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.ru/pify?keyword=khalifah+bani+abbasiyah+pdf
    • http://nufab.enidbridalshop.com/uploads/1/3/1/4/131483200/4820946.pdf
    • http://files.mollycoolapproved.com/uploads/1/3/1/4/131454098/b680e25af.pdf
    • http://nejakuwe.artbodysoulstudio.com/uploads/1/3/1/3/131378960/c642c46.pdf
    • https://cdn.shopify.com/s/files/1/0431/8072/0294/files/12367119578.pdf
    • https://cdn.shopify.com/s/files/1/0437/2017/9864/files/10403045486.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/module_8_basic_aerodynamics_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xugufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/nulimovosibizarup.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3419/files/mifofepufasufunowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6977/4750/files/jodavari.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/caput_succedaneum_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/fanafufuromebakulevepami.pdf
    • https://cdn.shopify.com/s/files/1/0439/3422/0456/files/fabiboxowigokizes.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/78175215472.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
stream_006_off000130f2.bin
5a3067ee095e55edde9b1419b1a766d1181de76d574d030cbde3b7ca7e17d147		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x130F2 17532 bytes
font_00_sfnt_off0000fc3f.bin
f67fb3917151526e016c5a897fabf3e15f70775362fac7ebc645743f0b4125dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3F 5244 bytes
font_01_sfnt_off00010e13.bin
1a9a93a02b92557b61dbf0bcf4fd7231156a952e9bdf05ec3473bba62d858b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E13 10124 bytes

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