Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c443e815d721ee…

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 17:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8ef43b16c0a43cffcddd78a0451f9a7 SHA-1: 3899230022a4819a54f4add70b842f5d11694b32 SHA-256: 89c443e815d721eea141599148fc300fa7c2da2f9bbc3d895183100ae7f79b56
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious content, specifically disguised as a free puzzle download. The primary malicious URL identified is https://ttraff.com/pify?keyword=ankush+lamba+100+puzzle+pdf+free+download, which likely serves as a redirector to further malicious sites. The document body and embedded URLs confirm the lure of a 'puzzle pdf free download'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ankush+lamba+100+puzzle+pdf+free+download
    • http://files.andersonsallstars.com/uploads/1/3/1/6/131606405/wolixoxolifi-munodenok.pdf
    • http://files.lexarosean.com/uploads/1/3/2/7/132712080/vusilun-porego-xidikale.pdf
    • http://files.bowerclocks.com/uploads/1/3/1/4/131455621/a640e9dfa04.pdf
    • https://cdn.shopify.com/s/files/1/0429/5163/9196/files/dejafizomixezosusadufada.pdf
    • https://cdn.shopify.com/s/files/1/0440/8757/4678/files/5695952284.pdf
    • https://cdn.shopify.com/s/files/1/0440/8652/6102/files/85654883394.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/66242386944.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/puzizesukubesapuwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/mitotugosujudaxit.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/44285015945.pdf
    • https://cdn.shopify.com/s/files/1/0439/3641/5899/files/60852895208.pdf
    • https://cdn.shopify.com/s/files/1/0436/5654/4409/files/weight_loss_workout_plan_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/50296003287.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufuma.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/wofadufo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2085/2122/files/32991884777.pdf
    • https://cdn.shopify.com/s/files/1/0437/9472/7069/files/taxesesizigex.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_off00004e45.bin
86e27276462cae7205e29ebb82ec9c66e351f2ae1c9bc8c49ff214be8a14b009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E45 5808 bytes
font_01_sfnt_off000061fd.bin
6a72c855d2fb87bf4168756d2ad794fc5b84972498592d18409b3e5772390fbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 12824 bytes

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