Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb26ed4a189dfc8…

MALICIOUS

PDF

54.9 KB Created: 2020-08-03 11:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27f46e4184141615325c16f24fd258b8 SHA-1: 9e9f2fccf72ac6140a3aa4c8bbdbc36053a46d4f SHA-256: 1bb26ed4a189dfc868d5ffe8d160c2171b16f87cc333605a9891a2a69043c4cf
154 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=cultivo+de+arveja+plagas+y+enfermedades+pdf', is identified as a malicious redirector. The presence of a large number of external links suggests an attempt to manipulate search engine rankings or distribute malicious content through a network of sites.

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=cultivo+de+arveja+plagas+y+enfermedades+pdf
    • http://sevakow.14fps.com/uploads/1/3/1/8/131856543/af80071fd0e96a.pdf
    • http://files.fineartfinewinefair.com/uploads/1/3/2/6/132680808/giguxas_zugowomi_terogi_lovevabedesar.pdf
    • http://files.letteringchallenges.com/uploads/1/3/1/4/131437987/jirurumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/sawodedosidisifeguriwif.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/windows_10_scheduled_restart.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/64271764036.pdf
    • https://cdn.shopify.com/s/files/1/0430/1714/2433/files/99484582258.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/piwoduwuroxen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0960/files/paridiginetato.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/18799477750.pdf
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/kaxagukawewosipikub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/ditagi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/nixedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/62780836327.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/givikosadibe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/bibisebimixaruwufabapil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/45285090790.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_off0000977e.bin
b40c0b837aa59510c0318139345bc8ea135eb1d5de0e5c42f48862c27b8483bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x977E 5504 bytes
font_01_sfnt_off0000aa33.bin
41b7732845b2fd3d291c7c3a15552b0716d3f2d704025c6a3e402932a06d8402
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA33 10980 bytes