Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55e6f421aef67fc…

MALICIOUS

PDF

47.8 KB Created: 2020-08-28 03:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea9a412eb0d5ad79dcb82ad45aae54be SHA-1: a681bcfb22278a506ab50667b5d09fda384c21e6 SHA-256: d55e6f421aef67fc09838466baa0c185f5d713d031b0586496b71ebf07af9880
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=drive+the+surprising+truth+about+what+motivates+us+daniel+h.+pink'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many hosted on cdn.shopify.com. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the presence of a malicious redirector suggests the document's primary purpose is to lead the user to a harmful destination.

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.cc/pify?keyword=drive+the+surprising+truth+about+what+motivates+us+daniel+h.+pink
    • http://juwivubo.littleelsiescloset.com/uploads/1/3/1/6/131637016/a98ee6305c85d2f.pdf
    • http://files.wisedemocracy.org/uploads/1/3/2/6/132695280/jijali.pdf
    • http://files.davisbaybc.com/uploads/1/3/0/8/130813417/metirokag.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/24988964204.pdf
    • https://cdn.shopify.com/s/files/1/0462/0684/5081/files/etapa_preoperacional_de_jean_piaget.pdf
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/kenovulinexetas.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/43020110728.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/autocad_commands_list_in.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/44465041522.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6659/files/castle_crashers_magic.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/anjathey_movie_in_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/beyonce_brokenhearted_girl_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/nanujujugaxogozoda.pdf
    • https://cdn.shopify.com/s/files/1/0438/2041/7181/files/the_light_between_oceans_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/systematic_thinking_for_social_action.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/
    • https://cdn.shopify.com/s/files/1/0433/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b54.bin
56fe48f1966b09f81942e0b0032aa4121e0b8ead2a01298bd387c4650030caec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B54 5640 bytes
font_01_sfnt_off00007e65.bin
55688a47cde4fd439dd081d7c6955e21f7007936be08ed8966fe7eacc18179f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E65 10804 bytes
font_02_sfnt_off0000a34b.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA34B 4324 bytes

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