Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7f842ea4c070d4…

MALICIOUS

PDF

45.9 KB Created: 2020-08-11 00:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c61ecfd1ad9c4226496b1206bc002d14 SHA-1: abcc49151ae0839e1dc299662da184e6896cfc1c SHA-256: 9e7f842ea4c070d46c553ca0cfa8da4e40e0233ef95d483d1beb559f6956328d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=butler+model+pdf', which likely serves as a gateway to further malicious content. The presence of a large number of links, many pointing to Shopify domains, suggests an attempt to create a link farm for SEO manipulation or to obscure the true malicious destination. The ML classifier also strongly indicated maliciousness.

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=butler+model+pdf
    • http://tadik.retrohacks.net/uploads/1/3/1/0/131069839/bijoras_deketid_xovizefuvadet.pdf
    • http://files.blehdi.com/uploads/1/3/2/6/132695994/5984759.pdf
    • http://files.funtastic101.co.uk/uploads/1/3/0/9/130969004/guwubibadoger.pdf
    • http://files.jewishcemeteryutah.org/uploads/1/3/0/7/130776197/1900296.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/saxojebuvadu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/zudafawopinarapugut.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/basics_of_computer_science.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/82000447829.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/tababevixepopajogajoji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9312/2460/files/97136184024.pdf
    • https://cdn.shopify.com/s/files/1/0434/5636/4709/files/94035932524.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/badozinukezizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24863128440.pdf
    • https://cdn.shopify.com/s/files/1/0430/9729/2967/files/xigakakaxukopinuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/praises_bethel_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1794/files/nofajenejarofebudirug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7800/files/56315953589.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/mikamalomilotiveriruf.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_off00006a15.bin
e264792b0bdc601cee0983a914e77cd9564a51df235510bcc256562108dd14bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A15 4848 bytes
font_01_sfnt_off00007a7e.bin
36abbb2284468cc4c046123a3b63db3a068680dd42fa86422e279ccdef20a16d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7E 15688 bytes

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