Malicious PDF — malware analysis report

Static analysis result for SHA-256 10609b56d57bce69…

MALICIOUS

PDF

68.0 KB Created: 2020-08-01 12:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02ecf34dbcf8e48a76cfe2cd8db9e626 SHA-1: bd0cac6f80424749c26be66318bee472fc05aaaf SHA-256: 10609b56d57bce69a215698cb512ead7c3b16717ab0bbfcee721635470752bdb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=how+to+say+no+in+every+language`. It also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify-hosted files. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=how+to+say+no+in+every+language
    • http://files.weindogearth.com/uploads/1/3/0/9/130969405/7f9ace901d63.pdf
    • http://files.rampollaenterprises.com/uploads/1/3/1/8/131857421/resoselip_sitinemewibuwif_tufopuxorimup.pdf
    • http://files.emma-kassel.com/uploads/1/3/1/3/131380063/83eddbb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/musutikozofan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/migopiwivalu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8288/4006/files/bujimolaso.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/ponerotarukevejosupuso.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/80623892605.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/63182029422.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/wugemoluzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/69760597875.pdf
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/99443821572.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/70208585603.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/3890398560.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/91563748434.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aeb.bin
7fb81d9bb0077dbfb35a902bacdebe3dbc6f5e8ef22b821c93aedf71cd71d89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEB 5248 bytes
font_01_sfnt_off00007d89.bin
efb56e826d9fdf727c620e313ef3a62df9b4c3bec72f757f26ce287a48351130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D89 4948 bytes
font_02_sfnt_off00008e7c.bin
2bf4638f264815f7ff1f9317ca6b96518fe49f84e9e6b194342ca4c87b4f1d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7C 3880 bytes
font_03_sfnt_off00009a9d.bin
05a37133893220225166da4872dc0d57e1fa02eb15a06d63ae32a4d962120017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9D 11500 bytes
font_04_sfnt_off0000c090.bin
e4708b018dddffb74f3dc484817dfdc11ddfda91c8c2c6424174c5658de0c5ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC090 16768 bytes
font_05_sfnt_off0000d82a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD82A 4324 bytes
font_06_sfnt_off0000e62a.bin
36b5bb4b1e8898188f671b4c4fd4bbb74d541827af827a45702eee2d9d030c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE62A 2976 bytes
font_07_sfnt_off0000f233.bin
6fb0ecc1f2d0a8c098e362b33c785c564be9fb4b69880d40ef60e58dfcaa8b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF233 4548 bytes

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