Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffa39d1e83ae39a…

MALICIOUS

PDF

35.7 KB Created: 2020-08-01 00:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be101b314c603936053512efa2e4aed7 SHA-1: c76f337c2c786db9c93b864cdea6e958997ea20d SHA-256: fffa39d1e83ae39a77b221fc720e3d93b305fe07d80b5c3b3842e1862e07d773
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to 'hp+10bii+manual' and the malicious URL, suggesting a lure to a fake manual page. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=hp+10bii+manual
    • http://files.mary-johnson.com/uploads/1/3/0/9/130969705/a1e14.pdf
    • http://files.taleinferno.com/uploads/1/3/0/8/130874189/fokonufesiloga-tikelusajo.pdf
    • http://files.digginthenew.com/uploads/1/3/1/8/131856041/rixagozomum-bawexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1549/files/52257644658.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/77845620303.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/17523932934.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/41438384017.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/woxaxojig.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pezajumukupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/rugejixinidetalisodaju.pdf
    • https://cdn.shopify.com/s/files/1/0433/5822/4549/files/pogowiviw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1965/7628/files/wedisuman.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/71061015740.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_off00004480.bin
edcf9fd9335a725649649eb1de7294f9ef1c9b317f395e5765e6367dd3394d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4480 4560 bytes
font_01_sfnt_off000053c5.bin
1bf1c10e195f39ac23f6fd8fe4e73e6d14755ad1fd6516cdc6ee2b3b025d4237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C5 9596 bytes
font_02_sfnt_off0000744e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 4324 bytes

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