Malicious PDF — malware analysis report

Static analysis result for SHA-256 7110163a8626aa98…

MALICIOUS

PDF

43.7 KB Created: 2020-08-01 11:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 963559e8a21414f21cf78645709eebfd SHA-1: ce3976473c231a6fee49b71a5199d2996c08d8fc SHA-256: 7110163a8626aa9830a7c7427bbb09b8ebbaf951d745ac7faa210a76b92bb452
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used to lure users to download further content. The document body, though heavily obfuscated, contains embedded URLs and text suggesting a lure related to installing Windows 7 from USB. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning and distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=install+windows+7+from+usb
    • http://files.bestcprseattle.com/uploads/1/3/2/3/132302859/4922287.pdf
    • http://files.longbeachcoastalchallenge.com/uploads/1/3/0/8/130814014/bezeneforilo_wejefovajinasu.pdf
    • http://files.dminami.com/uploads/1/3/1/8/131872273/7e63bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0605/7883/files/jojobukaguvaludugi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/32533413495.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/90761352550.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/ratodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8241/files/nozodojulafelitukiwejato.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/tuwufesuvogeropi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8889/files/49459845983.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/79354200247.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/dagokutitumefojinu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2471/8746/files/vitopetedijojidaraziximoj.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_off00006085.bin
e224aad7e101a57d319b24019a640dbf08838bb49751139a0ac9ccf01813818a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 5068 bytes
font_01_sfnt_off000071a9.bin
e2ad787186f78c59e63d9d8cd4cd14e92a14ee905c8657b0d7b5da5636759ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 10020 bytes
font_02_sfnt_off00009404.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9404 4324 bytes

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