Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0bc43b603ebd702…

MALICIOUS

PDF

39.2 KB Created: 2020-08-02 19:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b016357041d6dbb7c52ed580d105f94 SHA-1: 61dd1b1a436757ca26320a4e0348d77bbe9a647a SHA-256: c0bc43b603ebd70234202328e297e1c931c300c7d759b9d6a37ab39db2279f37
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one prominent link pointing to a redirector. The document body, though heavily obfuscated, contains references to 'Texas instruments 30xiib' and the malicious URL 'https://ttraff.com/pify?keyword=texas+instruments+30xiib'. This suggests the document is designed to lure users into clicking the malicious link, likely leading to a phishing page or malware download. No scripts were extracted from this sample.

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=texas+instruments+30xiib
    • http://files.uccmedfield.org/uploads/1/3/1/3/131383045/7c0b21e34b.pdf
    • http://files.dakotaashleymarie.com/uploads/1/3/2/7/132740639/dd3bcffaa44e7.pdf
    • http://files.themindfulchristian.com/uploads/1/3/1/4/131437862/961533.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2821/files/mebunixekokupa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/34576613737.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64831632673.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/tumotov.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2655/files/34117821232.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/4652888614.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/jowixefupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/61257195805.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/51877083176.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/jepeda.pdf
    • https://cdn.shopify.com/s/files/1/0440/3275/3829/files/40112132830.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_off0000578b.bin
7d70a834e176b79911265d6c0730c18e0281e4def6c34853442b6a8eec5e453e
pdf-font-stream PDF embedded font (sfnt) at offset 0x578B 5264 bytes
font_01_sfnt_off00006954.bin
9e6ff374b43b07097e3cca2d784e4595456b25a6f174cf012685e5e15c24b9ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 11596 bytes