Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddf3c325af39b9d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-14 02:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4453d5067e012f9a5e6f1fe75483eefc SHA-1: 7a70c3ab75448b887ecaec466ae7f1184bc9c034 SHA-256: bddf3c325af39b9d522317e947ae41b7a4e610ee8dd928e4c2c8725b98fe34a1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=deca+direct+reporter', is flagged as a known malicious redirector. The document body contains garbled text but also includes the same redirector URL and several benign-looking Shopify URLs, suggesting a lure or distraction. The primary attack pattern involves redirecting the user to malicious infrastructure via the embedded links.

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.cc/pify?keyword=deca+direct+reporter
    • http://files.klayworks.com/uploads/1/3/0/7/130776726/vutisiwaxo.pdf
    • http://files.taaonline.org/uploads/1/3/0/7/130739039/568906.pdf
    • http://files.sourcesconference.com/uploads/1/3/0/7/130776592/3109539.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/juwafowalapiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/calf_strain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/4494/6588/files/26510909920.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/vacunas_polisacridos.pdf
    • https://cdn.shopify.com/s/files/1/0439/4650/8456/files/whisky_price_list_in_delhi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/lopipaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/istvan_banyai_re_zoom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/60242220272.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/64973524263.pdf
    • https://cdn.shopify.com/s/files/1/0439/3179/5624/files/87941577324.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/finologilovoxawiranox.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_off00005a1b.bin
fd63d17a2d94a090352e3478fd8e842e9189d1bff3b0a0c146cc0f0bbfdb6d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1B 4856 bytes
font_01_sfnt_off00006aa8.bin
f06cfd7eff8ee1d11ff3b4063d9e8d9e689c4ace59df3dd8aea2b6d280b1a718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA8 10524 bytes

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