Malicious PDF — malware analysis report

Static analysis result for SHA-256 d955bc012ea50f7f…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 20:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec0f51cceb0eb94b53b5f7499c32894 SHA-1: faacb207c5d1dbfbff0c4d8629829c26b9f39e95 SHA-256: d955bc012ea50f7fc2bbf17d6d02d4d491ac1bb433bebd26854ba0efcad80660
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded URLs suggest a lure for a free PDF download, which is a common tactic for phishing or malware delivery. The PDF_SEO_LINK_FARM heuristic further suggests this document is part of a larger link farm operation, likely to improve search engine ranking for malicious content. 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=oxford+handbook+of+clinical+pharmacy+3rd+edition+pdf+free+download
    • http://files.couplematters.org/uploads/1/3/1/6/131606789/dutoterowu-poxuj-fakogubot-tixodef.pdf
    • http://files.the-5fs.com/uploads/1/3/2/6/132695300/jumopega-vazokaxadulive-nivux.pdf
    • http://lilegi.allgranitesarasota.com/uploads/1/3/1/6/131636855/lepezojizepa-mojurekudasepo-waposo.pdf
    • http://files.wellnessfeast.com/uploads/1/3/0/8/130874350/texowu.pdf
    • http://files.judykitsunestudio.com/uploads/1/3/1/8/131871477/pinunagudetuwim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/73308240192.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/60965020823.pdf
    • https://cdn.shopify.com/s/files/1/0432/3940/7784/files/xikidenetupakodevoweponi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/install_pip3_centos.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/92043791835.pdf
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/64674559355.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kofuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0558/3266/files/dimefawivenolofukagep.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/dasabixerebezixisowefemo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/90863532220.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5832/files/todinafuwinixafe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8185/9225/files/24223142472.pdf
    • https://cdn.shopify.com/s/files/1/0433/9829/9813/files/arrl_ham_band_plan.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_off000063f4.bin
8d677986bc18c8c8c7ad600732315ccee60d59bf1f942cea8e0a64cf8226f2bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 5660 bytes
font_01_sfnt_off0000771b.bin
99e079c0affa7ba4b119793850fdc903e048977bdcf72e7c6265eb4ba70678d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771B 9920 bytes
font_02_sfnt_off00009918.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9918 4324 bytes

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