Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3f1908da575d80…

MALICIOUS

PDF

51.9 KB Created: 2020-07-30 13:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc986149c31a7ba10e531f3e97eb04dd SHA-1: 71f9c00eac1f101b55d28df7fdb8239867ad6726 SHA-256: fb3f1908da575d80ea00b7b61e76e71aba42452a9efee08b0316a872a6b15f78
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. It also contains a heuristic for a link farm, with the primary link leading to a Shopify URL. The ML classifier strongly indicates maliciousness. The document body appears to be malformed or encrypted, but the presence of the redirector link suggests a phishing or redirection attempt.

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.cc/pify?keyword=aldosterona+fisiologia+pdf
    • http://files.kristoferthornton.com/uploads/1/3/2/6/132680781/jiwozugazigazokudi.pdf
    • http://files.fragmentapp.info/uploads/1/3/1/4/131409200/roradubojoje.pdf
    • http://files.natashasteer.com/uploads/1/3/1/4/131437953/6248808.pdf
    • http://files.twistedclovers.com/uploads/1/3/0/7/130738769/vemasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/keferasu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/vemavizuneruvivitudu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/45191892143.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/3176805245.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/7299341036.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/kusuruzowalawolalewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/pavepipulepanas.pdf
    • https://cdn.shopify.com/s/files/1/0433/3128/9256/files/86935400927.pdf
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/9209564209.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doworefobose.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/wowebol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/51780192133.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_off00008e2f.bin
a6bdf98655177e7081482b3f88a8bb7eb07e6535ce0ff863f3095fce3b224887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2F 4988 bytes
font_01_sfnt_off00009f2e.bin
fc641f366ecf745a0cc007752518f2d78c12c3a8a463757c37d248fe6420abbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 10208 bytes

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