Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fbcff93e26d3519…

MALICIOUS

PDF

40.8 KB Created: 2020-08-18 17:46:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a95f985c3069e3ec3befc450b7238d6b SHA-1: f4f10fc023d2f20330b2874f6c1a67d496054441 SHA-256: 7fbcff93e26d3519c7da9215a742424f429069d09c99fc6ccaafa9e3b5ebfb5c
150 Risk Score

Malware Insights

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

The PDF contains a prominent link with the text "Free credit report online government" which, when clicked, redirects to a malicious URL. This is further supported by heuristics indicating a malicious redirector link and a PDF link farm. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, confirming the intent to trick users into visiting a potentially harmful site.

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=free+credit+report+online+government
    • http://files.hannahjoanfilms.com/uploads/1/3/2/6/132696030/furidozobiloxaz_radexu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/vifafusesigig.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1480/files/formal_resignation_letter_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0437/3279/5541/files/lynyrd_skynyrd_curtis_lowe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/91887342088.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/nilejitomewi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6648/files/28118335948.pdf
    • https://cdn.shopify.com/s/files/1/0431/1711/7601/files/series_de_lyman_balmer_paschen_brackett_y_pfund.pdf
    • https://cdn.shopify.com/s/files/1/0431/3186/3202/files/kuruniwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/78633740144.pdf
    • https://cdn.shopify.com/s/files/1/0439/0181/2888/files/aaradhike_song_karaoke_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/gudaboxo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e3.bin
f61e823ff280de8aa8be86b858cc4e74043260ee3f680c219fd6d4ca2eecdac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 5020 bytes
font_01_sfnt_off000073f0.bin
140655d5bfa7e838d19959077bab9e8bb58550f12f89d10a2849e4e2adcb9e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F0 10176 bytes

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