Malicious PDF — malware analysis report

Static analysis result for SHA-256 0018a595d0931879…

MALICIOUS

PDF

53.5 KB Created: 2020-08-03 23:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c19e7fbaecea646219bfd80061d7a0a SHA-1: 54ed11fe9d7e94ae6095e3cbcaa0e047eba29fe2 SHA-256: 0018a595d0931879efea5663c1b66883c8b2ed173aeccb85d23cf7c683bf96f1
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external sites designed to host further malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=am%25C3%25A9nagement+du+territoire+cours+pdf`, indicating a likely phishing or malware distribution attempt. The document body itself is heavily obfuscated and contains similar URLs, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=am%25C3%25A9nagement+du+territoire+cours+pdf
    • http://files.eaglecreeklavender.com/uploads/1/3/1/3/131398250/lopojurani-bikani-donugobujurulot-kugozetuxazal.pdf
    • http://files.francisansing.com/uploads/1/3/1/4/131437472/bekemupadulumi.pdf
    • http://sojapux.kinnistudios.com/uploads/1/3/0/7/130740013/kuwiwexoset.pdf
    • http://files.youngstiling.co.uk/uploads/1/3/2/6/132681482/fewovulibezumuvegem.pdf
    • http://jekipa.775marketing.com/uploads/1/3/1/8/131871699/naviruti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/kamivisope.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/10978561934.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/dipelazuxexupim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/zafutuga.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/23555314069.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/jexekajira.pdf
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/50076137844.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/64711366792.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/pelubefisumonosekamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/sekaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/sound_of_silence_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/88174090757.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f1f.bin
d5a6e8e88d4836f81800201d2180d82e3c89b586837f42d0f2eb0270f328b390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1F 5456 bytes
font_01_sfnt_off0000914b.bin
d0bdaa64291a2af093c091dde3f2609795a5cd9ce7a0e746546030c198b9a08a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x914B 12508 bytes
font_02_sfnt_off0000b856.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB856 4324 bytes

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