Malicious PDF — malware analysis report

Static analysis result for SHA-256 4721390614218785…

MALICIOUS

PDF

37.3 KB Created: 2020-08-14 21:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da15478b79cb20f6683dcd30c1be46ad SHA-1: f2e870fe70562f719b69583e8a7fd049c3635ea5 SHA-256: 47213906142187856fbf0f32b4cd8ac055cfc3970b0aab66a8d03fdbb201cf98
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a significant number of embedded URLs, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, https://ttraff.com/pify?keyword=writing+slope+intercept+form+with+two+points, is flagged as a known malicious redirector. While the document body contains garbled text, the presence of numerous links, including the malicious redirector, strongly suggests a malicious intent, likely to redirect users to harmful sites or to manipulate search engine results.

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=writing+slope+intercept+form+with+two+points
    • http://files.kozynook.com/uploads/1/3/1/3/131379262/ruwarotufulat.pdf
    • http://files.ebcentre.co.nz/uploads/1/3/0/7/130738801/rugunifiwetatizalusi.pdf
    • http://zadeda.ostrichhole.org/uploads/1/3/2/6/132681488/lawoganipufuwafo.pdf
    • http://kavup.specialhandsgroup.com/uploads/1/3/1/4/131453134/8f2216e084c.pdf
    • http://files.mariadeliagarcia.com/uploads/1/3/1/4/131411596/303575.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/30_60_90_onboarding_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/29142496645.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/37619663548.pdf
    • https://cdn.shopify.com/s/files/1/0429/3446/8774/files/xumewesenatitujowibumaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/47247763225.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/notazol.pdf
    • https://cdn.shopify.com/s/files/1/0448/9094/7739/files/campbell_ap_biology_9th_edition_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0451/0013/8661/files/masters_in_business_information_systems_salary.pdf
    • https://cdn.shopify.com/s/files/1/0437/7539/3944/files/electrocardiography_essentials.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/niroranefoxod.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/gimuwegazudowetu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0230/6468/files/49877848512.pdf
    • https://cdn.shopify.com/s/files/1/0429/4508/5606/files/minecraft_fallout_map.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_off0000537e.bin
4812111c627fecb87eb6145e28120ce627b7e6f80aee30ab325e3bddd19840a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x537E 5324 bytes
font_01_sfnt_off00006597.bin
86bee35fc66da43ffb02f01f04f9522512d3fae295778177673baf30c582e484		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 10076 bytes

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