Malicious PDF — malware analysis report

Static analysis result for SHA-256 b75b2a9113910d9f…

MALICIOUS

PDF

34.1 KB Created: 2020-08-18 22:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 888d72300d17710257356f2a3fe5a654 SHA-1: 37db9c93a40b95a0de3e78c3c8f3203af1517635 SHA-256: b75b2a9113910d9f66a72fed1a29ba0cf39a3a4da3b12de80286a7f3d5a27535
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to an 'Aztech homeplug av 200mbps wifi extender manual' and the malicious URL. This suggests a social engineering attack aiming to trick users into visiting a compromised site, likely for further malware delivery or credential harvesting.

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=aztech+homeplug+av+200mbps+wifi+extender+manual
    • http://files.zbmtwest.com/uploads/1/3/0/8/130874631/3432828.pdf
    • http://likiwo.allsaintsvista.org/uploads/1/3/1/3/131383657/vukobim-binofa-tufetu.pdf
    • http://files.raggedmountainrunning.com/uploads/1/3/2/6/132682030/bilatedu_pudisozipam.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/tutilosekudelemiven.pdf
    • https://cdn.shopify.com/s/files/1/0438/2870/7485/files/cs_go_config.pdf
    • https://cdn.shopify.com/s/files/1/0435/2308/0344/files/mutex_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/zonotewifivutiwat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/diagnostic_test_for_tuberculosis.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/pozuxal.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/nijukadu.pdf
    • https://cdn.shopify.com/s/files/1/0451/7802/8183/files/moboweseres.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/75573991091.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0701/files/theory_of_continental_drift.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4570/files/78816199129.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004559.bin
d944ba4fa90466209777fcf057276f73b3c820503643b57a3b06bbfbbc60ed61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4559 6244 bytes
font_01_sfnt_off00005a8e.bin
99dee4f5e892bf489fef145a0d38c0c1a09acff2e1f58c98a5b9a5a4fab0f52b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8E 9652 bytes

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