Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c19e4b166af88f…

MALICIOUS

PDF

77.0 KB Created: 2020-08-13 23:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 838ea6c0beeab58775a5bcb0cf8898f5 SHA-1: dc1d11b656416d9a0b9fa92aba5e505f4806348a SHA-256: 35c19e4b166af88f78e76195c2f2fc389036039ab6dec12d5be4066567e35fff
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to seemingly benign Shopify URLs, but also includes a critical link to a known malicious redirector at https://ttraff.ru/pify?keyword=frontiers+in+pediatrics+author+guidelines. This suggests a phishing or social engineering attempt to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack pattern.

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=frontiers+in+pediatrics+author+guidelines
    • http://fiwifasof.paradiselawngarden.com/uploads/1/3/0/7/130776257/152438.pdf
    • http://janaxal.saludpharmacyshop.com/uploads/1/3/1/4/131454065/zopoxebikulime_kulefen_varemurolumiv.pdf
    • http://files.heartlandjungians.org/uploads/1/3/0/7/130776841/ziniruper.pdf
    • http://files.creativeselluillustrations.com/uploads/1/3/0/8/130873838/5095ea.pdf
    • http://files.malcolm-morris.com/uploads/1/3/2/6/132695360/f296646f8eb631.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/agents_of_socialization_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63908687591.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/business_model_generation_alexander.pdf
    • https://cdn.shopify.com/s/files/1/0437/6385/9610/files/honeywell_t40_thermostat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/2190/5570/files/calendario_campionato_spagnolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/split_by_page_number_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8994/files/gibururevagironegev.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/job_application_letter_format_for_teacher.pdf
    • https://cdn.shopify.com/s/files/1/0432/5107/3174/files/orchidaceae_family.pdf
    • https://cdn.shopify.com/s/files/1/0432/2603/8433/files/rheem_electric_water_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/velugidipaguketirujux.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/exercices_articles_partitifs.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/lavixobutapubadikika.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_off0000b28a.bin
417f1819c86622536af3bcd35aeb08a11773f9e3dae2bfe04813773816dab401
pdf-font-stream PDF embedded font (sfnt) at offset 0xB28A 19492 bytes
font_01_sfnt_off0000ef87.bin
c2ab7d78143aa06af222128647fe56095144b9260f6928e997c3e05707702383
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 5288 bytes
font_02_sfnt_off00010179.bin
20f5fef3c00c86ec6badb03a2d03ea11e531fd8263639dc708db762edbe73d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10179 10696 bytes