Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b49d04927e0fc87…

MALICIOUS

PDF

37.8 KB Created: 2020-08-17 05:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f770ea7cc8dc403d627c22cd2774150 SHA-1: 35075e19361d0498f6b9908567cbe347dd34898e SHA-256: 8b49d04927e0fc87b3556a90ae423b62ad616f43b59d23946424db46a632f9a0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm with 10 external PDF links, many hosted on Shopify, and a critical redirector link to 'ttraff.cc'. The ML classifier strongly flagged this PDF as malicious. The document body, though malformed, contains text related to 'capacity management policy template' and the malicious URL, suggesting a lure to disguise the malicious intent. The primary attack pattern involves tricking the user into clicking the malicious redirector URL.

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=capacity+management+policy+template
    • http://bifimofu.simplejoys-photography.com/uploads/1/3/1/3/131380600/kofivixumaj.pdf
    • http://files.kavehbagherimd.net/uploads/1/3/1/0/131070367/660c70c1354.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/lugoxomijotopez.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/29997277419.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/positive_and_negative_impact_of_globalization.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/1504584149.pdf
    • https://cdn.shopify.com/s/files/1/0435/5804/3807/files/pisafubirowejiwalenesok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/rorugijenijisoxutajat.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9199/files/busukupasagisoserijitiwu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3942/2626/files/11243925908.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_off00005618.bin
88724b0607abf3868d523d79be321c46a7494e8ce2a6646a280ca53f8fe76ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5618 4988 bytes
font_01_sfnt_off00006708.bin
a138775bcf021a9341a99881a8074f4749674c57d78c17225f69e9786b520d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 10624 bytes

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