Malicious PDF — malware analysis report

Static analysis result for SHA-256 d62de57875aac808…

MALICIOUS

PDF

43.3 KB Created: 2020-08-08 11:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa8113b9d07dc6990df5df8fe9f89f2d SHA-1: f49a98c90bfb0f1c77f1e1fdb50bf17637f790fc SHA-256: d62de57875aac808bf75abacf40ec1926bf48c2d6086c79acd1e34e8231c2f69
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.com, which is known for distributing malware. The document body itself is heavily obfuscated but contains the same redirector URL and a large number of links to PDFs hosted on Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=concepto+de+ense%25C3%25B1anza+y+aprendizaje+segun+autores+pdf
    • http://files.helpabee.org/uploads/1/3/1/4/131437885/pugitibesapaje-zuxixoginol-walazozomuro-bodedowov.pdf
    • http://files.fundamentaladvantages.net/uploads/1/3/1/8/131856492/44c447ae56412f.pdf
    • http://files.corinnekernmusic.org/uploads/1/3/2/7/132740665/aae816.pdf
    • http://files.stmarysalehurst.com/uploads/1/3/1/6/131606006/d4ae004bbf1ee44.pdf
    • http://files.reggaeclassictouch.com/uploads/1/3/2/7/132740533/mapuv_razipub_soxupidi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1096/4131/files/75461566480.pdf
    • https://cdn.shopify.com/s/files/1/0438/2110/5309/files/38832704426.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/ganesh_atharvashirsha_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/lana_del_rey_cola_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/kidabexexilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/39039629886.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/73053362425.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/maryland_state_abbreviation.pdf
    • https://cdn.shopify.com/s/files/1/0437/5661/7877/files/49534794022.pdf
    • https://cdn.shopify.com/s/files/1/0431/7767/2868/files/african_american_music_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/refanowitebozefugibebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/56089183852.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9656/files/bunn_ultra_2_parts.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_off000066c1.bin
29c571765e20c9d00a6dbdd6502b85d44060415fa9ea75c403e2ea35d61b6969		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C1 5636 bytes
font_01_sfnt_off000079d2.bin
cbb50fe4d08d4f9c8a2f61178304c376275a8d22f2337c2fe33baa04ad0716b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D2 10892 bytes

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