Malicious PDF — malware analysis report

Static analysis result for SHA-256 0836394812f394d0…

MALICIOUS

PDF

57.3 KB Created: 2020-08-28 23:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 079d88d0eae720d62d750dbaa0c9848a SHA-1: 387c1b3cf224c69aa43de6aeb1b6c8ef8f466032 SHA-256: 0836394812f394d0eb7e2e6c534211ab24384212d335186ac2ec443ed52cfe49
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, with one identified as a known malicious redirector. The presence of a link farm and a redirector suggests an attempt to lure users to malicious sites. While no scripts were extracted, the structure and embedded URLs point towards a phishing or malware distribution campaign.

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/wix?keyword=factores+predisponentes+criminologia
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0462/3876/1120/files/kodak_scanmate_i1120_driver_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/40180924968.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/favekidutezuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/ackerman_proffit_classification.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ccab66bbe3a4a7c8b252fca15e89c60.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea909af08f64bdaa4c5220f14457c2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c3876efe6f341cd8e81be519e492161.pdf
    • https://static.usrfiles.com/ugd/b8c837_699892ac357241d5b7e9cd3e6467d43f.pdf
    • https://static.usrfiles.com/ugd/b8c837_258a96fa30bd41219800a6511a5ec1bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_14d029180e6840eb9c119c8550b51e49.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0c3c45da79249788ec0ee31b601bc21.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0428/2158/3004/files/goworunazelefuderadej.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c42.bin
52c56200179cac10ba7926370dcc0c3f0366162c76243b59706f434e006139c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C42 5136 bytes
font_01_sfnt_off00006d92.bin
f415fb280d0dafdc083ec5090704ce96705d5451ba29a6ca12b3b6a0898aa2d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D92 5464 bytes
font_02_sfnt_off00007fed.bin
f4938fcffe3fe770597eb15dc97e532f985b0c466024bae017d97b7ad8b89934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FED 12196 bytes
font_03_sfnt_off0000a5f5.bin
f8fa0b238ec2b54f3f273be207d6bf72ef2cc9cba725d38c55971e460eb35c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F5 16492 bytes
font_04_sfnt_off0000bc6d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6D 4324 bytes
font_05_sfnt_off0000ca6e.bin
abd14335c003ae8679678df243f713a0c884901e87d89d7b621d5a0080e3bfb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6E 3060 bytes

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