Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cc7df1ceeb1d6f…

MALICIOUS

PDF

49.5 KB Created: 2020-08-14 06:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2d04fb9bb7635799fb771a4a5ab8f66 SHA-1: 25c8d5c302e45017ce8fa300a05dbb19a968f976 SHA-256: a2cc7df1ceeb1d6f6f60213d3c7a574fda5a45ac51e39543754865e3c854019a
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic indicates a malicious redirector link to 'ttraff.ru' which is disguised as a college admission form. This suggests the document's primary purpose is to redirect users to malicious infrastructure, potentially for phishing or malware distribution.

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.ru/pify?keyword=college+admission+form+format+in+ms+word
    • http://files.lifesparkz.net/uploads/1/3/1/3/131383727/bimepuwubazef-rojor-mepifapir-gawexu.pdf
    • http://tikuvut.matthewshannon.net/uploads/1/3/2/6/132682090/gupinuwujirepogogi.pdf
    • http://files.ignitethejoy.org/uploads/1/3/1/4/131438202/edd32ab9c76a1a.pdf
    • https://cdn.shopify.com/s/files/1/0435/4346/2037/files/cardinalidade_base_de_dados_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8646/3647/files/maharashtra_b._ed_cet_books.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/18320351467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuxovozukirofavekejob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/zufusovikewusemamus.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/56796452985.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/twilight_the_graphic_novel_collector_s_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/92064210034.pdf
    • https://cdn.shopify.com/s/files/1/0438/8818/1400/files/vifavemimogadepebuvumowaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/27996346799.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/minokofofinota.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/mivovuwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/2809536111.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/bicc_cable_glands_catalogue.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_off0000857b.bin
1ed343a1139f13bb7199bc52c6bf1d79a1ae9a569ee4db7dbd77357526017ac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857B 5224 bytes
font_01_sfnt_off0000973c.bin
6de1f109ff19da15e6b7cb7f7d362fe111f4ce3056164e4c8795cc2530cd8003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973C 9852 bytes

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