Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f77199acbc90a6…

MALICIOUS

PDF

48.0 KB Created: 2020-08-12 06:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb1c8a8b4c62ba9172522f7498ed2809 SHA-1: 52ea9c17c082cf8b3273383f5290d45a42f4087a SHA-256: b2f77199acbc90a61a3e4cc80cb419fdf01274da9278ece28ed289261cbe20d8
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identifies a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=creative+brief+form+pdf'. While the document body contains text related to a creative brief, the primary malicious function appears to be the mass distribution of links, likely to lure users to malicious sites. No scripts were extracted, limiting the analysis of direct payload execution.

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.cc/pify?keyword=creative+brief+form+pdf
    • http://files.horsetoheart.net/uploads/1/3/1/4/131406843/47949.pdf
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131437725/5780307.pdf
    • http://files.kfxfarms.com/uploads/1/3/1/3/131379443/womaka_lebapenojeni_kovulirelobe.pdf
    • http://jakolaxup.charlielavaroni.com/uploads/1/3/0/8/130813592/gibak.pdf
    • http://toraneno.wandlevalleyforum.org/uploads/1/3/1/6/131636948/risudofidakemu_nururelugar_gugoxufozub_fikimefapem.pdf
    • https://cdn.shopify.com/s/files/1/0430/9857/0909/files/42043094464.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/16843148947.pdf
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/xekarinutukulebexupetig.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/93679418835.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/68421808462.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/ap_computer_science_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/33586813501.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/xejuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0435/6289/3471/files/sewilejikawumapasijilud.pdf
    • https://cdn.shopify.com/s/files/1/0451/8245/1861/files/advertisement_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/7283/8039/files/acuerdos_de_convivencia_en_el_aula.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070cb.bin
fdcd6c0e40946d48918fb9824407c13f2e1b91c585577ffe456a1af4e2870bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70CB 4880 bytes
font_01_sfnt_off0000816a.bin
be84a77190cc8c6797963dda2553d872a8fcb651290220ecf753a79275de1f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x816A 10500 bytes
font_02_sfnt_off0000a522.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA522 4324 bytes

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