Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcdd140544e1a86…

MALICIOUS

PDF

54.2 KB Created: 2020-08-02 00:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03bc9750b60a5743e00dc2a0a1c1e502 SHA-1: ea98167c3707cf5955d93d2b214c4a326d6a11c1 SHA-256: 7dcdd140544e1a86aeae9949d3466b23999f0b24670c2066b76c75533add5707
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, including one to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'thermostat manual' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm further indicates malicious intent.

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=coleman-+mach+rv+thermostat+manual
    • http://files.gcaschool.org/uploads/1/3/1/4/131482937/7302505.pdf
    • http://files.secretseeker.com/uploads/1/3/0/9/130969211/lasexatugisenigix.pdf
    • http://files.orovillesecondaryteachers.org/uploads/1/3/0/7/130740625/68bb702.pdf
    • http://files.materialise-creativity.com/uploads/1/3/1/4/131482823/7043925.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/43948597805.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/73502605421.pdf
    • https://cdn.shopify.com/s/files/1/0436/3884/9694/files/69819854439.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/sedituluzojegojidavu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/levafifusexipamofozupogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/kisunagesuwobibewezofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gerakofidasetivivirodipel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0810/files/mosodoronavaseke.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/37724134532.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4032/files/9446078079.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/mob_cap_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/punenef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008031.bin
351f86210366aa36acf46a5a310201ec66d632b0477c5b0365b74c9cc8b62655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8031 5036 bytes
font_01_sfnt_off00009125.bin
c03fd971fa3e11c0ef73dfaa94010a74472591ef58b745f740371381b1357680		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9125 10504 bytes
font_02_sfnt_off0000b541.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB541 16312 bytes

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