Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc5e29322f7b5a5…

MALICIOUS

PDF

44.1 KB Created: 2020-11-01 07:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5824b03e9e844813623d98abe4159da SHA-1: 1ce6e3690a87e4e9bff4253ecfacc4a3cd749d6d SHA-256: fcc5e29322f7b5a56a1cee3709769acaaf3b14eb89e09b95e8cddc3349ed52b9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, embedding numerous other PDF links, some of which are benign but others are unknown. The presence of embedded URLs and the malicious redirector link strongly indicate a phishing or redirection attempt, likely to deliver a secondary payload or lead to a malicious site.

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.club/123?keyword=persona+5+tower+guide
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/1242677.pdf
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/gudogekolaxabi-sogusuzawesu-nawuxugokanivuw-lalapipi.pdf
    • https://cdn-cms.f-static.net/uploads/4387054/normal_5f94d7a1a3668.pdf
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/zuwiramulenu.pdf
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5f9391ae6bedc.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/sejivepigogetu_fefab_dotarenezona.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0506/4366/5050/files/minecraft_biome_tier_list.pdf
    • https://cdn.shopify.com/s/files/1/0504/1442/0129/files/mapagax.pdf
    • https://cdn.shopify.com/s/files/1/0495/4973/8136/files/new_orleans_weather_10_day_forecast_hourly.pdf
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/arya_eragon_fanfiction.pdf
    • https://cdn.shopify.com/s/files/1/0268/7238/1628/files/51085612413.pdf
    • https://cdn.shopify.com/s/files/1/0500/5652/8032/files/75787917939.pdf
    • https://cdn.shopify.com/s/files/1/0266/9094/5223/files/sonupotivujud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ffe.bin
aac9496dfc5e90a15237e59d07111f511504b20c31963bec09be2dbb0d41ecdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 5060 bytes
font_01_sfnt_off00007149.bin
453416e178769e723a55f9ed15e0bd37e3eb1c54ee9eeb5c15ec17a155b64e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7149 10572 bytes
font_02_sfnt_off00009549.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9549 4324 bytes

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