Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe667795a13cca2a…

MALICIOUS

PDF

60.5 KB Created: 2020-08-04 19:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9ec8a4dc4cd5c0748f0df8f462c4785 SHA-1: eb8d88159eb2af698014f7dc3245f24078ab1945 SHA-256: fe667795a13cca2aecf22ff22106b9ea25f086d71a10d23b62beef779c74c94b
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=python+tutorial+ppt+pdf, which likely serves as a gateway to further malicious content. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to lure victims.

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.ru/pify?keyword=python+tutorial+ppt+pdf
    • http://files.original-items.com/uploads/1/3/0/7/130739348/8722643.pdf
    • http://files.mauiwaenaband.org/uploads/1/3/0/7/130775544/896333.pdf
    • http://tizamoli.eduardoalvesevents.com/uploads/1/3/1/4/131453329/wokuwotararojixep.pdf
    • http://files.purposedbackgrounds.org/uploads/1/3/1/1/131164156/9b1aade1b8b0.pdf
    • http://files.ironstonemeadery.com/uploads/1/3/2/6/132683168/5491caac204bc.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/sibigugafe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2550/6208/files/lebojumokefatarozod.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/fukafijejoriteli.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/5034211243.pdf
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/83934022752.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/putifajolekubapifanit.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/78189635186.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/81268403139.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/4612873551.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/75514060133.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/75311035183.pdf
    • https://cdn.shopify.com/s/files/1/0434/3853/8904/files/76036049307.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/go_launcher_ex._apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/4518/9792/files/99155902162.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
font_00_sfnt_off00009004.bin
4d3fb6748bdbfc0676bbc246a341b567ec3707c335db72ae26270b639488ab50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9004 1684 bytes
font_01_sfnt_off00009868.bin
bf435a5ff0201f897245829e94132c5c20e4c5ee2732481accc974001e73e13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9868 4820 bytes
font_02_sfnt_off0000a8b6.bin
6969422e8620471e969f02b4ecce3685dc8f929e802c8d6c4b2eaead8f204950		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B6 14728 bytes
font_03_sfnt_off0000d6be.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BE 4324 bytes

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