Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f96a0c9e051324a…

MALICIOUS

PDF

55.8 KB Created: 2020-07-31 19:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b00008071c6319603bbe48c51d129244 SHA-1: d867244eb18efb14c708f9d5081287ef1147e5d5 SHA-256: 6f96a0c9e051324a752b71c06bc5190facba67f63eeffff098d244cdad170caa
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary link redirecting to malicious infrastructure. The heuristic firings indicate this PDF is a malicious redirector and part of a link farm, likely intended to drive traffic to malicious sites. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=kedareswara+vratham+telugu+pdf
    • http://files.quinta-milhafre.com/uploads/1/3/1/4/131437822/xizanenuf.pdf
    • http://files.alexsarna.com/uploads/1/3/0/7/130775509/2479236.pdf
    • http://files.learningtobuyahome.com/uploads/1/3/1/6/131606743/3848019.pdf
    • http://files.sheltiesalberta.com/uploads/1/3/0/7/130739267/tumajusidibugo_gajebumufa_zujekerewo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/60060745699.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/56150732122.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/99556069784.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/zatofiki.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/toxilijame.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/90115965004.pdf
    • https://cdn.shopify.com/s/files/1/0432/6617/9230/files/96819594587.pdf
    • https://cdn.shopify.com/s/files/1/0428/2925/0719/files/85071231600.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/xuketawelogu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/80685851134.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/50868649126.pdf
    • https://cdn.shopify.com/s/files/1/0433/6268/0984/files/mawapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/honda_gc160_manual.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_off000076f4.bin
0e3c8331841ef1c4c929af2af4828630c4866d4f0f80fdd89c7e3dcb526905bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 5576 bytes
font_01_sfnt_off000089e2.bin
9ce5c2a1b7cd7d4d4a81c262d363bbbd850c71b18e53cd3ea55eb32692d62210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E2 10800 bytes
font_02_sfnt_off0000a8cc.bin
14fdbe64ef735f0628cfe91942606f5a2dbecf575e60dfc709c10d0d4ba637f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8CC 12492 bytes

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