Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0ff7372c97a012…

MALICIOUS

PDF

52.0 KB Created: 2020-09-03 00:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8e4dd60ed28541b742bc460cd3371cb SHA-1: 999ea97956c9effd495906e200c51b51732c730c SHA-256: ff0ff7372c97a01252646f8bc481975d6ffe49147aaf87a9375e7ec81853da34
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector at `ttraff.ru`. This suggests a link farm or redirection campaign designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness.

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=androidx+migration+react+native
    • https://cdn.shopify.com/s/files/1/0462/1628/2266/files/30208794376.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5162/files/donofuxepopodilalif.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/ingersoll_rand_285b-_6.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/duxirazavogaruje.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/minority_report_full_movie_in_hd.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/strength_training_anatomy_3rd_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/complete_sentence_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/gapupusutavero.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/metukogapedisiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/tecnologia_medica.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/papebaju.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9890/files/foxeziperusaxopis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/tesunolironogikalak.pdf
    • https://static.usrfiles.com/ugd/b8c837_506ecb35fdbd4189b8bc2a72fbc73606.pdf
    • https://static.usrfiles.com/ugd/c3f88d_0892d07571ea440984044113f11527f9.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000612f.bin
00d1c51e986adc0f2b491dc7417c562986763f87289405e796e30427cd2d0307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612F 5168 bytes
font_01_sfnt_off000072aa.bin
d72734b22f4547bb143113b41a7f7008d1d7810f4f1d2575573e192f09599215		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AA 3992 bytes
font_02_sfnt_off00008230.bin
114d591aac20e42ecf01e8689f350697b361305de913a0f45d117bf14a73027b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8230 12900 bytes
font_03_sfnt_off0000ac1a.bin
22fee59f972fb7e921b35c42d8a730bcdafc44233eae33d116dd546d6ceb68c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC1A 16576 bytes

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