Malicious PDF — malware analysis report

Static analysis result for SHA-256 16865c8d213519f2…

MALICIOUS

PDF

46.6 KB Created: 2020-07-29 18:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f0083bb3db8268851739555d956e0a SHA-1: 119a8e8ea64173ecb10aa8de292b6864c60fa5b8 SHA-256: 16865c8d213519f254e08f4accb9467344295a83c0421ee790323a2e3c125878
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, suggests a lure related to a 'Mapamundi con nombres de paises pdf'. The presence of numerous external links, including those to Shopify, indicates a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be directing users to malicious URLs.

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=mapamundi+con+nombres+de+paises+pdf
    • http://files.alkalinerainforestherbs.com/uploads/1/3/1/4/131438190/runojot.pdf
    • http://files.smokeyjoespipehouse.com/uploads/1/3/1/8/131856353/d03c9085d.pdf
    • http://files.vitodorazio.com/uploads/1/3/1/3/131380875/diweretenofaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/67820643910.pdf
    • https://cdn.shopify.com/s/files/1/0438/1143/8752/files/24454669726.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/5397460802.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/36198861089.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/85940512002.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/56071220355.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/56080949286.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5558/files/keregoxosubadanar.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/77811540944.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/vazelewamadawibufuretajun.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/fivogupujifijororoje.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007582.bin
63b788aca35237fc60e95f05e02a442ec73f88016ddd57dbe8818e808c9f99f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7582 5216 bytes
font_01_sfnt_off0000870f.bin
3f49908ceb7504a54ccfbab58ead47dbe8d5bc11578c5dccf72532569f344ad2
pdf-font-stream PDF embedded font (sfnt) at offset 0x870F 11140 bytes