Malicious PDF — malware analysis report

Static analysis result for SHA-256 6469e00d3b618f61…

MALICIOUS

PDF

49.8 KB Created: 2020-08-14 13:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d320abb354ced9a5e97556791733cab3 SHA-1: e7d355de865a48fe3afee212719b3c68cb7ebb98 SHA-256: 6469e00d3b618f6192dd8f449b8b658bb643fe9dbc115dbbb97d88fc4984ac28
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDFs hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=black+mirror+striking+vipers, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an intent to redirect the user to malicious infrastructure. The ML classifier also strongly indicated 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.com/pify?keyword=black+mirror+striking+vipers
    • http://fetizile.jeannehenry.com/uploads/1/3/0/9/130969893/dukofejarid-belugovi-bozazur.pdf
    • http://files.cailenfu.com/uploads/1/3/1/4/131437444/rutez_wubusaxofab_kajali_zuwogor.pdf
    • http://sanir.stmarysstonehaven.org/uploads/1/3/0/8/130874474/mukuwux_demoxixo_migenadewu.pdf
    • http://files.samsysgroup.com.au/uploads/1/3/1/4/131407552/bikumaxezobitof-fozupe-watubijaza-lojix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7880/2846/files/94764891216.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/zuxolorujudosonemolukol.pdf
    • https://cdn.shopify.com/s/files/1/0429/2788/2407/files/lung_abscess_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/auditoria_informatica_de_explotacion.pdf
    • https://cdn.shopify.com/s/files/1/0434/9142/6469/files/preheater_cement_plant.pdf
    • https://cdn.shopify.com/s/files/1/0437/1732/9064/files/authentication_protocols.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/a_fast_string_searching_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/34027255187.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/zitodores.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/vojenotexulu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/24695137387.pdf
    • https://cdn.shopify.com/s/files/1/0435/8357/0083/files/vuxirumumezoribiwevupig.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_off0000855d.bin
e7a9481c6111a0c85214ff2961456b5edd8091a85f68424481b16ed23ba2bd44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855D 5428 bytes
font_01_sfnt_off000097c3.bin
6bb29392bf390564add7f8b1e5a29579df691238dfa23aa0728acf6828bc877c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C3 10048 bytes

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