Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d703e8ece97795…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 10:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85611d2ad1b50214a65792f3facc655a SHA-1: fd9c2de2e7db2dd8b5001ee0ea6618c16ccbe23a SHA-256: 63d703e8ece97795b76936fe1d9280966047f837b4737b34646913d672ba1b03
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a maintenance manual. This redirector likely leads to a malicious payload or phishing page. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent. No scripts were extracted, but the primary attack vector appears to be a malicious link embedded within the document.

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/wix?keyword=bobcat+s630+maintenance+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_db36a262cf0345a29e1921386e480fe3.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_3302c10227d146be899fefdb2267d469.pdf
    • https://static.usrfiles.com/ugd/3eed2b_30a06596fb2744419f286f0c4a6baf26.pdf
    • https://cdn.shopify.com/s/files/1/0436/8121/8710/files/11145169817.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/24511606409.pdf
    • https://cdn.shopify.com/s/files/1/0448/1312/3744/files/28489187469.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/excel_bedingte_formatierung_textinhalt_mehrere_wrter.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4347/files/silamaxatofin.pdf
    • https://static.usrfiles.com/ugd/0cd019_97c1420ed95942fe8e50ef922e492279.pdf
    • https://static.usrfiles.com/ugd/1be480_8ecb87f674324347a7e5701066c821c8.pdf
    • https://static.usrfiles.com/ugd/83f04e_844713f3b2264b0fa797f8bd004b8944.pdf
    • https://static.usrfiles.com/ugd/b8c837_f85a0c8408f24b5a8176195d23d1c47f.pdf
    • https://static.usrfiles.com/ugd/7598fa_cff771cffe84489297973eabe81c464e.pdf
    • https://static.usrfiles.com/ugd/efb3f0_857e6eae0bd34150b32ff11b26449177.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a5.bin
3247f722be0783b283a068ec82d2f3cba7becd5c26ace4cf71828ca9dd3cc1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 5380 bytes
font_01_sfnt_off000072cc.bin
6bf4ead5f93402c2065db4e0aae5acb905eecb14c8549b278b17fb73db130e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 13084 bytes
font_02_sfnt_off00009c59.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C59 4324 bytes

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