Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee243a4692f795df…

MALICIOUS

PDF

40.8 KB Created: 2020-08-14 18:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29dfc621e8df0c5dab13896ac5f6aa3b SHA-1: a16d70e0ca05849c0ec4e9d4b0b532a267e7b4ef SHA-256: ee243a4692f795dfcd8de2bebabac91fe09d29ececf641c009585a845b8a23cf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a malicious redirector link disguised as a financial calculator, aiming to trick users into clicking it. The ML classifier strongly indicates maliciousness. The embedded URL `https://ttraff.cc/pify?keyword=ppf+interest+calculator+excel+sheet` is a primary indicator of this phishing attempt. The document also hosts a large number of other PDF links, likely for SEO manipulation or to distribute further malicious content.

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.cc/pify?keyword=ppf+interest+calculator+excel+sheet
    • http://roten.silverlining-press.com/uploads/1/3/0/8/130814328/jiwufuruxisas.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/crise_asma_tratamento.pdf
    • https://cdn.shopify.com/s/files/1/0428/8181/0595/files/wojuxawuzisidiw.pdf
    • https://cdn.shopify.com/s/files/1/0447/4336/0663/files/55406760055.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/33798288604.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/38769441077.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/dukiwuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/pubuki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kofuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9345/0134/files/96425256357.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jedajuzosefowi.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_off0000619a.bin
e7be3e6e4a66500c306d5ca9d22e961a1b3ac1c5baa3771e893c1a595d44107e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619A 5172 bytes
font_01_sfnt_off00007323.bin
157eb63a9e0023705e2bd1b99e58071f30d4deba9483cb83976d3c7926a83843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7323 10332 bytes

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