Malicious PDF — malware analysis report

Static analysis result for SHA-256 897ca681b8b0f436…

MALICIOUS

PDF

45.2 KB Created: 2020-08-21 08:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67a5051c7be4e61a8669c35a019e1687 SHA-1: 03aacf2e333486e0c969f6388f0532a7a0bf06b0 SHA-256: 897ca681b8b0f436c4b0cbcbc9dddaf4cb918ab6e2d2129670da8bb38b3b924d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=gutachten+jura+zeitform'. Another critical heuristic flagged the document as a link farm, containing 30 external PDF links, likely intended to manipulate search engine results or distribute malware. The document body contains obfuscated text and URLs, further supporting the malicious intent.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=gutachten+jura+zeitform
    • http://files.memorialvocalmusic.com/uploads/1/3/1/4/131453284/c15cbe0aa17.pdf
    • http://vuxavofe.janesmitheditor.com/uploads/1/3/0/7/130738971/7910910.pdf
    • http://files.arielcao.com/uploads/1/3/0/8/130814769/keniwalidebuv.pdf
    • http://rumetor.interporcspain.org/uploads/1/3/0/9/130969060/05217a59e254b.pdf
    • https://cdn.shopify.com/s/files/1/0438/1392/9122/files/antrenmanlarla_geometri_10._snf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/lobapemobolumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/67908986380.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/nuwivopakora.pdf
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/jekoweki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/atomic_structure_of_first_20_elements_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/tukajexikemi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2010/6404/files/nespresso_essenza_mini_solo_capsule_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/73233016808.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/learn_kannada_in_30_days.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/3880670713.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8574/files/heart_of_worship_chords_key_of_d.pdf
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/91817781665.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/calendario_menstrual_2018_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4982/files/52402511769.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_off0000736c.bin
e23720932e456c779bb1f27d9a12649f22ea1800b47d7380ae98605cac54cdb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x736C 5068 bytes
font_01_sfnt_off0000848c.bin
15e5b6f7e85c63d37184ae1be573d8b7a06aa522841d78b664648e5de7303293
pdf-font-stream PDF embedded font (sfnt) at offset 0x848C 10804 bytes