Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa72f73508cd147…

MALICIOUS

PDF

45.3 KB Created: 2020-08-26 01:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8f0b28c4a3abeb4213f71d55cb6c601 SHA-1: 87c9056ca73a9809d94e2dec313b8fd3bc98d340 SHA-256: 2fa72f73508cd147b1d05786667f9bdcfaf028d842bb3bdd8a71b33ba0e87d4f
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, also contains this URL. The presence of a 'download button' heuristic further suggests a lure to download content. The PDF is structured as a link farm, with many links hosted on cdn.shopify.com, likely to obscure the malicious intent.

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=3d+shapes+formulas
    • http://files.mohinisblogs.com/uploads/1/3/1/3/131384359/ef9bc0.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/wejimi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/the_five_year_engagement_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0446/0979/8307/files/16259826461.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/faux_leather_repair_kit.pdf
    • https://cdn.shopify.com/s/files/1/0436/0306/7038/files/bodylastics_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0431/5044/2652/files/bavopirunexokuto.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/fusazumowiwofejarazub.pdf
    • https://cdn.shopify.com/s/files/1/0434/4184/8470/files/electronics_engineering_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/cara_membuat_cv_menggunakan.pdf
    • https://cdn.shopify.com/s/files/1/0430/3064/2837/files/22252131640.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/17471639129.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_off00005f3e.bin
b364ee23c5f0ece9aeb9094fb209e065a3c61c7bd2f07dc85773ef880c3d7f02
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3E 5348 bytes
font_01_sfnt_off00007142.bin
fe7890a2d9c4cebf781e866a5c1f3c966fb92289b1db524e11683e03cdc658c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 10128 bytes
font_02_sfnt_off0000941a.bin
83584419218d40bdc96a2934431814a78dc441f63de5b9e99774fbb65ef3d982
pdf-font-stream PDF embedded font (sfnt) at offset 0x941A 16080 bytes