Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d6afc63cb355ac…

MALICIOUS

PDF

41.3 KB Created: 2020-08-09 07:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9329a25776313f54e15708d04ecbc86 SHA-1: f33beab1e50a1a2dc7970ca726aa2b4cfeefc319 SHA-256: a2d6afc63cb355ac64f1814add62161ee04800d82e3f50363ea43dd71b874cc6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to ttraffic.com, suggesting a link farm or phishing lure. The document body, though partially corrupted, contains text related to 'Factors affecting demand in economics pdf' and the malicious URL, indicating an attempt to disguise malicious activity as a legitimate document. The ML classifier strongly supports the malicious verdict.

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=factors+affecting+demand+in+economics+pdf
    • http://files.thecapacitygroup.org/uploads/1/3/1/6/131636807/sulevituj-tupelefazid.pdf
    • http://files.chickencooptheatre.com/uploads/1/3/1/6/131606289/sekakifutak.pdf
    • http://files.cnsbeauty.com/uploads/1/3/0/8/130814682/rimuxulefepewabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/tewegumefumurivagalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3973/files/fabubuwaloweteb.pdf
    • https://cdn.shopify.com/s/files/1/0433/6038/7227/files/99975798676.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22945880436.pdf
    • https://cdn.shopify.com/s/files/1/0433/6143/5813/files/gutoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/5099/8679/files/brihaspati_vrat_katha_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/muwisenuxafegavuxurewaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/oasis_stop_cryin_your_heart_out_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8787/files/ahmednagar_district_information_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/gijanoximaba.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/36150076863.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/myanmar_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/1338/9992/files/capitalismo_y_comunismo.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_off0000638e.bin
8c155cdb35205ea02808d24d485d092c75e2d0c8d3a7d2f655105bc082ec3aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 5396 bytes
font_01_sfnt_off000075d7.bin
6f1d492acf6cdcf9fb576546e51a895a802f94c500bd356efed24b6a74bf3374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75D7 10068 bytes

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