Malicious PDF — malware analysis report

Static analysis result for SHA-256 4293aec76a16f705…

MALICIOUS

PDF

49.4 KB Created: 2020-08-03 13:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 141c7f7a8de54fcb60e207da9c5b0ad6 SHA-1: 9cb5e7bbcaab7c2d7dbc4c8b5486087ea7ba79c1 SHA-256: 4293aec76a16f70573f184d2b73416895e407d4dd3fd0eafb36fa1fd3e65b503
152 Risk Score

Malware Insights

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

The PDF contains a lure referencing a 'Hogwarts acceptance letter' and embeds numerous links. One critical heuristic indicates a malicious redirector link to 'ttraff.com', suggesting the document's purpose is to redirect users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded links and PDF structure are sufficient to infer a phishing or redirection attack.

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=hogwarts+acceptance+letter+pdf
    • http://files.premiertruckparts.ca/uploads/1/3/1/8/131860204/tezofinimaxuka-nirafetobe.pdf
    • http://files.healthhubus.com/uploads/1/3/1/4/131437792/xavebigox-sirojexe-tuteka-mipujozexor.pdf
    • http://files.studioi8.com/uploads/1/3/1/8/131871501/feb7fcb.pdf
    • http://files.maskcarabeautycolormatchgina.com/uploads/1/3/1/4/131483201/9480824.pdf
    • http://files.richlandareafarmersmarket.org/uploads/1/3/2/3/132303269/73cc8d18e73e4b.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/love_dare_complete.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/xeniteresoxowuvidi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2977/files/zutivujupu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7029/9038/files/poxukikiziv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/1609033191.pdf
    • https://cdn.shopify.com/s/files/1/0432/0785/2192/files/6944884007.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/33359452495.pdf
    • https://cdn.shopify.com/s/files/1/0435/1252/9055/files/67775298180.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/legedemafej.pdf
    • https://cdn.shopify.com/s/files/1/0432/5860/9819/files/52105538511.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/free_audio_enhancer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/77782123417.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7d.bin
24dbdf1d0c8adab5f939c690883ed3a901179bc212d5cffd3678ce04586b2246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5376 bytes
font_01_sfnt_off000070ec.bin
df52e5b98cba29bfc7b1dcae008464af370284a02a130e6f81d7c30c9b403125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70EC 10584 bytes
font_02_sfnt_off00009536.bin
746d791233c79ad9e33888686e61515308148bf7c03e100c2ef710b127eca373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9536 16928 bytes
font_03_sfnt_off0000aceb.bin
e68b24175d5971d76b4c28d2c0db5c95ec99c51429de742704ab5baffc55f2f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACEB 2752 bytes

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