Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a672c46226e73b…

MALICIOUS

PDF

36.9 KB Created: 2020-08-08 01:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59873924b4275d6975fb519ea3a1b95a SHA-1: a6e31bbb888459ae0eab03bc6c79a9e8bddef8a4 SHA-256: 01a672c46226e73b215af2ac3d050583fa26dd19b59fb2d175401640a716aff6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though partially obfuscated, includes a URL that matches the redirector heuristic. This suggests the primary purpose is to lure users to malicious or spam-related content via these links.

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.com/pify?keyword=genetics+in+medicine+thompson+pdf
    • http://wijus.majestictheatre-lee.com/uploads/1/3/2/6/132681579/zivesam.pdf
    • http://files.shopflawlesshepcat.com/uploads/1/3/0/8/130814397/bozog-sopevewisameni-zajixizavesip.pdf
    • http://files.danielsuniqueartforms.com/uploads/1/3/0/8/130813796/8770157.pdf
    • http://files.doulaaileen.com/uploads/1/3/0/8/130874520/bcbf49f72b1063.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5150/0188/files/kubajajidanegagazepal.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/83127403601.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/tugipotosofakefa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4734/files/bulgakov_master_and_margarita.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/68302093024.pdf
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/bawexifisukinuzolugider.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/tubowinol.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/single_variable_calculus_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/16204681149.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/masuzumofakow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1994/3579/files/pelef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/18916272116.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_off00005127.bin
92c225d84095d74012d446299314aca7d5afe9b8361f4880b74411c88bb04b86
pdf-font-stream PDF embedded font (sfnt) at offset 0x5127 5088 bytes
font_01_sfnt_off00006259.bin
ec4e41d9ba25191fc6abda62f4b8438d70063b206d22b1a73899c540d3940e28
pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 10552 bytes