Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da3416fb624fba7…

MALICIOUS

PDF

53.3 KB Created: 2020-08-18 13:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50cf0fe6ca6ea9394507fe7b7b0f9c9d SHA-1: c6f01fe153cb1bf54605d9e61de5617d31d87d7f SHA-256: 2da3416fb624fba731764c29b5163b0ecdc4695e9974e4c376621699045b6ade
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic, indicating a lure to a malicious site.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=critical+thinking+worksheets+for+7th+grade+pdf
    • http://files.oceanafamilyliteracy.org/uploads/1/3/1/3/131384638/raguko.pdf
    • http://files.kristinebournemsrn.com/uploads/1/3/2/8/132814024/palazidepote.pdf
    • http://files.torilaynepermanentcosmetics.net/uploads/1/3/1/4/131407952/zugukako.pdf
    • http://files.carolynriker.com/uploads/1/3/0/8/130814644/9761240.pdf
    • http://files.prop1st.com/uploads/1/3/0/9/130969139/tarekidigazoz.pdf
    • http://files.torilaynepermanentcosmetics
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/binks_2001_spray_gun_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/games_bejeweled_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/car_games_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0447/9628/0983/files/astounding_science_fiction_october_1953.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/puda_building_bye_laws.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7070/files/44356575871.pdf
    • https://cdn.shopify.com/s/files/1/0433/9453/1484/files/papazulujinudo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5468/5599/files/acid_base_titration_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/bazunikonezexamalufir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6068/files/gepulebofurunuka.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083d6.bin
330307dc72a808393f94862d4e6d7661cf02232ed8590dc024bfd50e377cf078
pdf-font-stream PDF embedded font (sfnt) at offset 0x83D6 5464 bytes
font_01_sfnt_off0000967a.bin
b17fe9329cd50299ebad9d6d31efbb2ba15e2a350aff80b35bb6d127a4986ec2
pdf-font-stream PDF embedded font (sfnt) at offset 0x967A 10244 bytes
font_02_sfnt_off0000b970.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xB970 4324 bytes