Malicious PDF — malware analysis report

Static analysis result for SHA-256 04955d1b062e67cb…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 22:36:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce79c409a2f2499decfe1d5ec478da0c SHA-1: c9fef1e749e1aa78fa017bd84acef56b38bf33ce SHA-256: 04955d1b062e67cbaaf6381ed4ac3d594f0247c67f7438afceea9483ee77b3a2
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bill of sale form car oklahoma' and includes the malicious URL, suggesting a phishing lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=bill+of+sale+form+car+oklahoma
    • http://zixope.cantaetion.net/uploads/1/3/1/4/131453495/986c8715b.pdf
    • http://files.hannahmassagetherapy.com/uploads/1/3/0/7/130776058/kozuzetako-fegeledado.pdf
    • http://vuroluzef.rudysdogpark.org/uploads/1/3/0/8/130874232/ff0e0129bb33.pdf
    • http://files.jemun.net/uploads/1/3/1/4/131437538/zimef-pafitakimu-kazuwapofi-xefulogekasa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/zovegelizidufudixiwab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/28105693440.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/pupamara.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/xipemuxipemen.pdf
    • https://cdn.shopify.com/s/files/1/0437/4118/4165/files/pokemon_showdown_hack.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/kiwegoza.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/1404538052.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/preschool_alphabet_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/gafawuguzipofomadogower.pdf
    • https://cdn.shopify.com/s/files/1/0433/1434/8197/files/kedirifelomeluxotirameg.pdf
    • https://cdn.shopify.com/s/files/1/0431/0650/0769/files/anterior_knee_pain_exercise.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_off000062b1.bin
f43598162bcdd3268e4327182de94b2cd022928aba7908633ead6236abbf3d12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B1 5232 bytes
font_01_sfnt_off00007453.bin
db43d0846e0f6397e9fb8bc7c9e3d37e9f59fa6fa2960d4718bf42a18c41024a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7453 9840 bytes

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