Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e97bf63f131cb3a…

MALICIOUS

PDF

35.2 KB Created: 2020-08-12 01:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee27bc1ccad275b2b453bc22b11cabd2 SHA-1: 9642b9f3b04b5dca92f9b54ba2a641c41703bf4e SHA-256: 9e97bf63f131cb3ac1bddd3b801ae33250c34918fc0c050e3d45f1164a5f04b9
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on Shopify. The primary malicious link, 'https://ttraff.cc/pify?keyword=antigona+sofocles+libro+pdf', is identified as a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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=antigona+sofocles+libro+pdf
    • http://binadujiw.willynillyphotography.com/uploads/1/3/1/8/131871505/giligeme_girowizule_relijopiwebax.pdf
    • http://gujud.laurenandersonrealty.com/uploads/1/3/1/0/131070357/riwedesezelatobidu.pdf
    • http://files.yorkieandmorkie.com/uploads/1/3/1/6/131636956/kigibowunogarizebilo.pdf
    • http://files.declared2020.com/uploads/1/3/0/7/130738622/1784879.pdf
    • http://juraged.perfeccionatupiel.com/uploads/1/3/2/6/132682090/nibanatax-xetinezewisos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafon.pdf
    • https://cdn.shopify.com/s/files/1/0431/6148/5471/files/76918842549.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/kozowudiruwenoxiwiza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/bopoduwigiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/bipolar_transistor_basics.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6835/files/mofuwisuli.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/jonbenet_ramsey_autopsy.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/types_of_chemical_bonds_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/accounting_tutorial_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/unbalanced_assignment_problem_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/81794479139.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_off00004a81.bin
1a2a28fe8fa26ff08a2f34e54bc421b8396a0f11b765a285257e728d9a588710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A81 5452 bytes
font_01_sfnt_off00005d0a.bin
83d9c353e50d9ff0fda3d31a85fdb6b2cd5b153532296c063c4b08e6a3899c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0A 10452 bytes

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