Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd4eda38a0cdf6b…

MALICIOUS

PDF

45.7 KB Created: 2020-08-04 16:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d48d1482f2c5c8fbbcc946532acc90a8 SHA-1: 5ebf80f56c02bad1a2793f2a9e8627d8fb12f639 SHA-256: 7fd4eda38a0cdf6b7fe18bc5d6cea96601a79b581d9b3161e9f1b89c24276acc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.com). The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a 'download button' heuristic further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=ageless+body+timeless+mind+book+pdf
    • http://files.educationpillar.com/uploads/1/3/1/6/131637498/wexazolabowu-rodon-zipiri-ziguninob.pdf
    • http://files.holyfamilyschoolcharleville.com/uploads/1/3/0/7/130776763/5952686.pdf
    • http://files.whatnowedtech.com/uploads/1/3/1/6/131606630/tijikidiriwalul-govuzatub.pdf
    • http://files.landscapeservicenassaucounty.com/uploads/1/3/0/7/130739564/000f1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/nenan.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/bevemubizijiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0592/6809/files/dapod.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/c_thread_example.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4695/files/malayalam_story_for_child.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/fetizox.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0487/files/20907774326.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/96098850648.pdf
    • https://cdn.shopify.com/s/files/1/0440/4461/5830/files/kevikevizimudikijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/tikefatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/ridowogabipaxobus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/osrs_tears_of_guthix.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007545.bin
bf24a8aa556c1904781723ef9a9a0f1fad6e52d2662605cfe7f00a49be9b0b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7545 5352 bytes
font_01_sfnt_off00008779.bin
496cb3fff8b720cf179c3f7b80a69671d6455cf67dde5d864e42a986a85325b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8779 9960 bytes

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