Malicious PDF — malware analysis report

Static analysis result for SHA-256 07764a1e51c7ed1c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 20:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16a3333d35131035624ff5bcb85d42f2 SHA-1: 8b8d4c4a3310731e1a53423d017b6cb4ad449210 SHA-256: 07764a1e51c7ed1c4ad82f5b517cd7561551fcb79cd2d237b1887b6627982a31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a 'calendar 2020 festival list pdf' and includes the malicious URL. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=calendar+2020+festival+list+pdf
    • http://files.adamcarter.plumbing/uploads/1/3/1/6/131607010/1243948.pdf
    • http://files.bgwellnessnow.com/uploads/1/3/0/7/130739069/3155030.pdf
    • http://files.jlangevine.com/uploads/1/3/1/4/131453188/wixowafevevig.pdf
    • http://files.whiterabbitdesigncompany.com/uploads/1/3/0/9/130969051/317ffa71.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1284/8790/files/jesijukopigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/fenejesaxevam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/wevuwesawuvoxumojujori.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/26540573719.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/71518578753.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/pawaripafuzewudosezalarag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/jevaginovidovanuvoven.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/pdf_file_compressor_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/93974805782.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/34625099275.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/el_si_de_las_nias_cervantes_virtual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/56978876661.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000710a.bin
60f79f5ee7e4aaa10f49eff72b701ff0663747a23db1711ae33de288c5de46f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710A 5272 bytes
font_01_sfnt_off0000830e.bin
fe2057375d9c6feebe969fb18f9557bff2b280f26f5a5a842b034225bb910c1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x830E 10412 bytes

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