Malicious PDF — malware analysis report

Static analysis result for SHA-256 422a2614f6704d20…

MALICIOUS

PDF

38.8 KB Created: 2020-08-08 05:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f40d61449186224655257ea675855155 SHA-1: 7bb18f9416a31e15bddb5e8acd937125c8f07b3a SHA-256: 422a2614f6704d2076f04a15584b627a8c6c4b9864a9025378bfee317667ef5b
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.com/pify?keyword=fundamentals+of+electrical+engineering+pdf+alexander'. This indicates a likely attempt to redirect users to malicious content or phishing pages. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of many shopify.com links suggests a link farm technique to improve search engine ranking for malicious content.

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=fundamentals+of+electrical+engineering+pdf+alexander
    • http://files.normandy-battlefield-tour-guides-association.com/uploads/1/3/1/3/131398573/sedazed.pdf
    • http://files.equaljusticeparty.org/uploads/1/3/2/7/132740852/takononidarizix.pdf
    • http://files.tolecoons.com/uploads/1/3/2/6/132695546/5637457.pdf
    • http://files.navy101.com/uploads/1/3/1/3/131383754/4295870.pdf
    • http://files.centralparkdata.com/uploads/1/3/0/7/130776673/jaxeniw.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/state_dropdown_html.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/pugijis.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/developer_mode_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/zapivosapogefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/27399750946.pdf
    • https://cdn.shopify.com/s/files/1/0439/2783/0696/files/monty_python_lumberjack.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/siselofivitijaligokozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/kemelutivomosusi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8945/1416/files/hunter_bis_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/gixurigizejovotefep.pdf
    • https://cdn.shopify.com/s/files/1/0436/2089/2834/files/personal_interview_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/niwarib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/rupotimivuliruzarupotekip.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c1c.bin
f32db2548e09f825e506fd1156b4aa96e9ac3819af25863638515317c7ed4642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C1C 5380 bytes
font_01_sfnt_off00005e56.bin
1559086ad602bd31498bd79676a441220a676fae10616b588cc5bd1585078c24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 9880 bytes
font_02_sfnt_off00007f78.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F78 4324 bytes

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