Malicious PDF — malware analysis report

Static analysis result for SHA-256 573461c69523e45d…

MALICIOUS

PDF

49.1 KB Created: 2020-08-14 13:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df8a98f5091b15b6826451e5332a1c67 SHA-1: 77f5072003113144857a903661514f2635bb152b SHA-256: 573461c69523e45d46ac140dfbc3ec644ea4055fbace547d3d3b31014038d723
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains references to 'John Lewis duvet cover size guide', likely a lure. The primary malicious IOC is the redirector URL, which is designed to lead the user to further malicious content. The ML classifier strongly indicates maliciousness.

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=john+lewis+duvet+cover+size+guide
    • http://kikasen.hcbmusic.com/uploads/1/3/1/3/131380213/6422037.pdf
    • http://lomimozuw.tumbleweedsandnotions.com/uploads/1/3/2/8/132814930/wukepezuva-maginu.pdf
    • http://files.michaelhaggins.com/uploads/1/3/0/9/130969175/nobeginejubawe.pdf
    • http://raripavij.learning-detours.com/uploads/1/3/1/3/131381489/bugadam-nujevaxedixi-gigobemu-zukigexirobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/trophy_garden_platinum.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/22933153038.pdf
    • https://cdn.shopify.com/s/files/1/0434/9453/9429/files/wildview_extreme_3.pdf
    • https://cdn.shopify.com/s/files/1/0440/3780/0086/files/94627640310.pdf
    • https://cdn.shopify.com/s/files/1/0432/8731/4590/files/waramovudowas.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/black_eyed_pea_salad_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/71037307900.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/brownie_first_aid_badge.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/tudepaxojurasujeliveg.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/gluten_free_diet_foods.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/24656483367.pdf
    • https://cdn.shopify.com/s/files/1/0437/3754/6917/files/80972167977.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_off00008178.bin
3a0c7efe56c4afd1998b9a42a3102fd9c63b84f9d0e10ac7a75ec48306d2df59
pdf-font-stream PDF embedded font (sfnt) at offset 0x8178 5184 bytes
font_01_sfnt_off0000932b.bin
3d778958930a218eb7194a49ce2ba5cc9b0c79673a581fbd3b12fe9e236ba5bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x932B 10800 bytes