Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25aca0671867a43…

MALICIOUS

PDF

46.4 KB Created: 2020-08-10 04:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e90d14fd7a87833c242e05256ea983fc SHA-1: 6f4ef04f501cdf77dac802fbb3881afc80d02fa7 SHA-256: a25aca0671867a43dcebce28818b7f660e9e77bb91d299cd89309741c8810747
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, likely for SEO manipulation or to host further 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.com/pify?keyword=thinking+fast+and+slow+book+review+pdf
    • http://files.crescenttrail.org/uploads/1/3/1/6/131606431/zobefurolimowef.pdf
    • http://files.hocrane.com/uploads/1/3/2/7/132740564/kuwojikixanis_vezesuki_xitulibis_laxijolotalin.pdf
    • http://files.burchcoveacademy.org/uploads/1/3/1/6/131606261/de6638e10d2da0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29426312843.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/81340647857.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3188/files/infernal_restraint_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0435/6754/6527/files/54833168258.pdf
    • https://cdn.shopify.com/s/files/1/0432/6395/1003/files/basic_punctuation_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/martin_j_pring_technical_analysis_explained_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6510/files/vewodododefe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/jezesiverugetutakid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1356/9690/files/26147344270.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/parabolic_dish_antenna.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/pcat_practice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/hak_kekayaan_intelektual_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0431/4585/5137/files/20866712010.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_off0000747c.bin
e3bd96d73f9f0dce96bd4e384cce272c17abba0357655c87257136ec91f16814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x747C 5608 bytes
font_01_sfnt_off000087a0.bin
0609ec1695c9ea9ed444bbd92d93d39fa2476f356ab23686e5e82d61e0adc0de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87A0 10784 bytes

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