Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df776f4c818c2bb…

MALICIOUS

PDF

63.2 KB Created: 2020-08-18 16:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31352555919a3e9c0a6cf8097cef1a1a SHA-1: 7a54e8583c1c9bd96aff64b4c20975499e347ec5 SHA-256: 3df776f4c818c2bbbba0b354f494b720bff70932528c291daf6b8f445b1e87f7
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=android+support+v7+jar++for+eclipse', is presented within the document body, suggesting a lure to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous links pointing to external resources, many hosted on Shopify. 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.ru/pify?keyword=android+support+v7+jar++for+eclipse
    • http://mavosa.andreavargasportfolio.com/uploads/1/3/1/6/131637814/774145.pdf
    • http://files.calmumcubs.org/uploads/1/3/1/4/131410685/zutexufe.pdf
    • http://somunolo.sacpdm9.com/uploads/1/3/2/8/132814930/fagoruwu.pdf
    • http://files.highlandbaptistgordo.com/uploads/1/3/2/6/132695194/besalamemofes.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/faleno.pdf
    • https://cdn.shopify.com/s/files/1/0431/7442/8827/files/79758436675.pdf
    • https://cdn.shopify.com/s/files/1/0439/9185/9358/files/27570020712.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/metabolism_of_carbohydrates_proteins_and_fats.pdf
    • https://cdn.shopify.com/s/files/1/0435/2393/2311/files/fazeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/7807/1960/files/tosomeborulozutixadirij.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/milaxemimanakesibujebod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/90906571462.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/47123638798.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/al_arabiyyah_bayna_yadayk_3.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068a8.bin
49752d8295003e369e493bac0d3f4e9386daa4a5903650662903c2a0f2662881		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A8 18184 bytes
font_01_sfnt_off0000a2b8.bin
3f6a6c2240f4c920f644a2b7a40c0418b50b76b119cb15e1264180825bc3ef42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B8 5352 bytes
font_02_sfnt_off0000b50c.bin
0b87ba501ee0f35bb5616a66397444c6cb65e0880570c6b70b493e79b0a86714		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB50C 11104 bytes
font_03_sfnt_off0000db1d.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1D 16036 bytes

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