Malicious PDF — malware analysis report

Static analysis result for SHA-256 110d92652bbc26b8…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 15:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 858eb9c41bf19d5460620d677ec31e98 SHA-1: b546a9f2b94aae97284c917db61e0071c96fe1f7 SHA-256: 110d92652bbc26b83826a9724d93a9f3908004e04453304e174bdb02eb164f85
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 (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, disguised as educational content. No scripts were extracted, but the presence of numerous links suggests an attempt to redirect users to malicious infrastructure.

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=wordly+wise+3000+book+8+lesson+10+pdf
    • http://files.greenedge-lawncare.com/uploads/1/3/1/0/131069879/c26d3867ce.pdf
    • http://files.childrenareourspecialty.com/uploads/1/3/1/4/131409055/74836.pdf
    • http://devurakur.djfainphotography.com/uploads/1/3/0/9/130969754/kajenagax_nufuz.pdf
    • http://files.tammyandtommytravel.com/uploads/1/3/0/8/130874672/dibefum-zetapuk-gadodididi-suzedimekepokaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0816/3993/files/tugizozedejilotozowabit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0436/3393/4496/files/prayer_timetable_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90296180399.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/pexetodulegesepota.pdf
    • https://cdn.shopify.com/s/files/1/0434/6209/9097/files/fusugotulakixizupezo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/electrical_engineering_mcqs_by_m_handa_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/dibagisosebujasiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5219/4202/files/venowigivitewawodolozat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/28273009667.pdf
    • https://cdn.shopify.com/s/files/1/0432/0840/9250/files/wordpress_change_font.pdf
    • https://cdn.shopify.com/s/files/1/0438/4433/7824/files/niweralibotimo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4197/files/damakidisibuvidaragadijes.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_off0000585e.bin
058d11396fc29d55bc07ac274307acedf210ea92b16eac3869f138d7e0b47ce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x585E 6996 bytes
font_01_sfnt_off0000702a.bin
d0d5a65775f5d2fd4a53c76bc77146392433fc2a89db28f8d96e27d94cafcabb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 5788 bytes
font_02_sfnt_off00008416.bin
0cc64c0b603146dc04a9fa725909fe7edd760be84df9df9568c570133df0caa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8416 10284 bytes

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