Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3fd5ed3c623a8fb…

MALICIOUS

PDF

45.7 KB Created: 2020-08-01 16:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e0ea772092b335872877ef947858769 SHA-1: 50ff0ce81d30ae55302b71ae34a93600bc97b63d SHA-256: a3fd5ed3c623a8fb341506ba245e27e5298fc59135f7c4a9a318bb4a2a8ee700
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=hp+office+pro+8600+download'. This URL is presented within the document body, disguised as a download link for HP Office Pro 8600 software. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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.cc/pify?keyword=hp+office+pro+8600+download
    • http://files.orderriseup.com/uploads/1/3/0/8/130813398/sojakegapar-lutosibis-napive.pdf
    • http://files.jsaadsales.com/uploads/1/3/1/3/131380511/zinutisogeb-dutisikimivovug.pdf
    • http://files.goodshepherdreading.org/uploads/1/3/2/7/132712214/nevuperek_wojozoguxez.pdf
    • http://files.chrislockett.com/uploads/1/3/1/8/131871772/aae4f0375.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/75910819320.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikodizexosuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8761/8463/files/bijaduvetisuvigeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/8321/9619/files/49647460185.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/41521894881.pdf
    • https://cdn.shopify.com/s/files/1/0433/8830/5575/files/mewatuxivonuzina.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/54238798792.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/52790064602.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7917/files/surixivezot.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/kidurezutemonunijawapow.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/15276553114.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_off000068c7.bin
e03e65d786f22d888cf05761df74528e6f076cc53eaa502551dd74534e6a0e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 5512 bytes
font_01_sfnt_off00007bab.bin
d7c30a1fb420bc4846130f11169b93718a3ccce36ba36184e60c34dc7f33fb21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BAB 15020 bytes

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