Malicious PDF — malware analysis report

Static analysis result for SHA-256 de65bcc9cf711820…

MALICIOUS

PDF

49.1 KB Created: 2020-08-05 11:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0ba3c2768f4a7882aa4e8a23904811f SHA-1: 01e3bc3c51b26ff5b7626a902d085104817957ad SHA-256: de65bcc9cf711820c4b7e249f6c349143da753e8270467bb312271be6b508d2a
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body, though heavily obfuscated, contains the target URL and a list of other URLs, many hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. No scripts were extracted, limiting the analysis of further 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=fluorescence+spectroscopy+pdf
    • http://files.knightsofmotorhoming.com/uploads/1/3/0/7/130739949/sugulix-kuxugovisobux-pijot.pdf
    • http://files.cloudtelephone.net/uploads/1/3/1/0/131070317/4942494.pdf
    • http://files.stmatthewsvoorheesville.org/uploads/1/3/1/3/131383456/7362439.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/2020472379.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/zowudelegomewovavesa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/ejercicios_tipos_de_sustantivos_1_eso.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/xasulowiwow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6968/files/adobe_after_effects_crack.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/ielts_fever_speaking_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1895/files/54673982598.pdf
    • https://cdn.shopify.com/s/files/1/0432/7289/6678/files/aptitude_and_reasoning_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/29579786155.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0429/8273/6031/files/antagonistas_canales_de_calcio.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_off00007539.bin
a80f52e2f3479dbc57e8c25efafe181b37bfb6e67010d216edb2b10c17d3abbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7539 4832 bytes
font_01_sfnt_off000085bd.bin
d72870745ee2857fcb8211d53cbffac385cfcc67d46fc027015876a2fed0cf35
pdf-font-stream PDF embedded font (sfnt) at offset 0x85BD 10380 bytes
font_02_sfnt_off0000a949.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA949 4324 bytes