Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d575164fcfdd8e…

MALICIOUS

PDF

39.6 KB Created: 2020-08-04 12:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da8d3e11e290b9202e3ddcb4801753f8 SHA-1: 452cf698c8aaab44e75c03e6a408aa6342a6775e SHA-256: f1d575164fcfdd8e1652acfa0b7b41fc1b298857f42756b4e80ade28c2199b70
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body also contains this URL, along with a large number of other URLs hosted on 'cdn.shopify.com' and various other domains, suggesting a link farm for SEO poisoning. The presence of a 'download button' heuristic further supports the lure of clicking a link. The primary attack pattern involves tricking the user into clicking the malicious link under the guise of a file converter.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=autocad+dwg+file+converter+to+pdf
    • http://files.shfestivalchoir.org/uploads/1/3/1/3/131383791/dasire-bijagafizi-taganabogev-xawuwiwawiwadu.pdf
    • http://files.dashwings.com/uploads/1/3/0/7/130775393/naboxuxaf_nagevalezore_zomefawokopunug_korule.pdf
    • http://files.sarahsheldonhypnotherapy.com/uploads/1/3/0/8/130814032/zidujigulomifo-gonufiga-lakiwevudimoral.pdf
    • http://files.kutiepiesweets.com/uploads/1/3/1/6/131606803/duzajuxowama_litasok.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8023/files/jaburobadesezutixekevix.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8042/files/luvinaxufuliz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/scx_3405_w.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/nisedazosog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/kunazafelurijititela.pdf
    • https://cdn.shopify.com/s/files/1/0435/1511/7727/files/associated_press_stylebook_2016.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/tafuxowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0524/7647/files/vujidamor.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/tekafufolupagonakomomuxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/50766613901.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/lakixajenak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6273/0645/files/fiwovegarorufaz.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_off00005d2c.bin
7d43430777344a18af77b64f79ac3e1e4ad63bc02d4579ca8dc0fc56f9bef290
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2C 5288 bytes
font_01_sfnt_off00006f58.bin
04ef2ec05e5c0194a2771d7eb1595cb97e61f6e45c51fee1cb5897c5ab563dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F58 9964 bytes