Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2c2d087861032c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-24 21:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 061df8bfe2112417803a96342e1d2ca9 SHA-1: bb3d7109c5a91dec344bc728ab1d2c92ac24c3e3 SHA-256: ec2c2d087861032c31587a45a7005db070714e3fbfc45c519a5809fba41f65a7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of a link farm. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=latest+instagram+free', is identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the malicious URL, suggesting an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=latest+instagram+free
    • http://files.girlaquarium.com/uploads/1/3/0/8/130813639/tonemutagulir-sifativis-bonofi.pdf
    • http://nexegu.freedominsurrender.blog/uploads/1/3/1/6/131607163/renanubepevu_bunemudupixo_mipixakag.pdf
    • http://jadifuz.mypramah.com/uploads/1/3/1/1/131164250/gitubopebo.pdf
    • http://files.ittakestworealestate.com.au/uploads/1/3/1/4/131437680/vugedak-rimimevow.pdf
    • http://bigukova.uniqueseminars.net/uploads/1/3/1/4/131483281/373732.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/kibekuletifubanopunewo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/types_of_friction_worksheet_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0461/0752/5283/files/app_cleaner_free_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/finepukekusawo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/pte_academic_word_list_e2.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/situmapilik.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/senodam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9134/6079/files/zoreresezodanitov.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4350/files/matizekorutuxurupa.pdf
    • https://cdn.shopify.com/s/files/1/0446/6514/3449/files/zubatikulozozis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/29187602200.pdf
    • https://cdn.shopify.com/s/files/1/0438/4145/4240/files/boost_converter_ti.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_off00006e97.bin
8f20ced815a8468a230d149ef2eec420481e9c220addca3822aa10a8d7f40397
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E97 4672 bytes
font_01_sfnt_off00007e4e.bin
a2b92cdc1b7ea2d1f2e3533ecfab62502e418b6552e70ef8bf203d0a85a7b077
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4E 10468 bytes
font_02_sfnt_off0000a209.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA209 4324 bytes