Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c78b44d0f57b25…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 01:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3843b6cc14e1ea8ed59756c2037ba5a SHA-1: 3b78dde76080c7cb821ddb1a5b9d9f29ecd1d420 SHA-256: 46c78b44d0f57b25c7268c07631804fc22beac125f9cb8ada7b08c8060d7d289
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL embedded in the document body. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The embedded URL 'https://ttraff.ru/pify?keyword=burger+king+coupons+pdf+2020+m%25C3%25A4rz' is a strong indicator of malicious intent, disguised as a coupon offer.

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.ru/pify?keyword=burger+king+coupons+pdf+2020+m%25C3%25A4rz
    • http://files.anthonycrammen.com/uploads/1/3/2/7/132711983/6046864.pdf
    • http://files.perreaultchiropracticrushcity.com/uploads/1/3/2/3/132303060/fapotarawew-resenekewegu.pdf
    • http://files.dlcdistributors.com/uploads/1/3/1/4/131438282/dc38b76b0f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/lusigosan.pdf
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/anticline_and_syncline.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2720/files/90741918846.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/towijidipinizenuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/27135631831.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/dauntless_jagged_spark_scale.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3884/files/wujunupafulotenumil.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/limoreni.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/jipafafixulugona.pdf
    • https://cdn.shopify.com/s/files/1/0440/2990/2998/files/lamazemovasevojotejirinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/40935502763.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_off00005b44.bin
03132f9328f00607bbcfa10570d723a389d9fad793ea74a070b5feee6a16b575		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B44 5904 bytes
font_01_sfnt_off00006f5c.bin
298c70fd87a939df9c034c90e8d64d3b26449b764c2bc4e70b00511c07d1277b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5C 10828 bytes

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