Malicious PDF — malware analysis report

Static analysis result for SHA-256 4456cc7851f4e2c7…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 05:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f77092c50c651557620f7330b7ba38e9 SHA-1: a5474413ae3ef78d0cf3227659d3bbb784b98765 SHA-256: 4456cc7851f4e2c78b8a6340e8746b18f3c04a19037860c62892917c38411f55
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL, https://ttraff.com/pify?keyword=11th+science+physics+refraction+of+light+pdf, is likely used to redirect users to a harmful destination. The document body contains garbled text but also includes the same URLs, reinforcing their presence within the document's 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=11th+science+physics+refraction+of+light+pdf
    • http://files.lillyzuckerman.com/uploads/1/3/1/6/131607029/bonezavuno.pdf
    • http://files.royaleorchids.com.au/uploads/1/3/1/4/131453226/jarenis.pdf
    • http://files.trailsofhopeandterrorthemovie.com/uploads/1/3/1/8/131871449/gepoberomogupaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/woodland_wa_weather.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/wupasusepivemovo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/gazuwene.pdf
    • https://cdn.shopify.com/s/files/1/0440/0345/9230/files/nitigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/kalesekafuxiwinumafelav.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68905528383.pdf
    • https://cdn.shopify.com/s/files/1/0434/7114/3078/files/wuzovedubogejumowuba.pdf
    • https://cdn.shopify.com/s/files/1/0429/1955/9335/files/egypt_pyramids_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/17555161944.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/rubigiporaset.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/kubezazatawawivewiwatupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/jiwatevulaxotaxagukime.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ee.bin
004f923caf2505849777e393d1fdfde9696a88ac8783f2c57c6173eac3f7cf8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55EE 5476 bytes
font_01_sfnt_off00006880.bin
421b161623eaf00bcc8c91fe273de396ea2137557fd93542afaa5fb5201ab5a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6880 9584 bytes
font_02_sfnt_off0000897d.bin
6bb35d4c3676f3032e4a45468878debb60b5044d8b182688b2934f7f19eae780		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897D 16188 bytes

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