Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3ddf98700aab4d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-23 04:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e2eb4aa6a80b1ca3d9cdc5cbb7cd2c2 SHA-1: eee8d279118c8baca8f6e80bd0b6e7cfb14d0479 SHA-256: 6a3ddf98700aab4deda1e503c6ae7052391a0ddbf1ccf55d5509913f0f403777
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=sad+broken+heart+status+video', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to redirect the user to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=sad+broken+heart+status+video
    • http://files.thecathedral.us/uploads/1/3/2/8/132815220/2816990.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/ribamigurajopimumozumazab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/65924930441.pdf
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/american_heart_association_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/zizegi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/annahar_newspaper.pdf
    • https://cdn.shopify.com/s/files/1/0437/1359/3499/files/21493091742.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/66257840965.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7749/files/xizinasosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/boss_song_ming_se.pdf
    • https://cdn.shopify.com/s/files/1/0435/8910/7869/files/pireregakelupidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/20767967937.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000469e.bin
837383ef8547a2d22bd3417ba92ec968df44d6f296003cd7261e7a8b01abb719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x469E 5248 bytes
font_01_sfnt_off00005863.bin
a647b54a48475bf08f8e3d727e40d702bdee1bb55a6b27af213b7a2fe896121e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5863 2672 bytes
font_02_sfnt_off000062cf.bin
dbb611926526c53bfd3aee32cc73cc3e6dea95116ec8066f6362153190b56f71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CF 9552 bytes
font_03_sfnt_off000083c3.bin
161f26cb6e5095c102173269733363ebc6bc8a0ddc6014f6333704b18d57f0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3 16584 bytes
font_04_sfnt_off00009a05.bin
a5f26dd7f6d96d24077dc082cdcdc8aea7fe25dc05aa56edc8361464cbe6884a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A05 3400 bytes

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