Malicious PDF — malware analysis report

Static analysis result for SHA-256 886782d2ae20706e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-02 22:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4f965953e9d8d950b6041c6bdac7ca9 SHA-1: f00a905c3ca7cfd58da496d01dd0e048fe787365 SHA-256: 886782d2ae20706e1901b5905734a21df788fab2391d45be8ac6cf76dfe4c89d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=factorio+8+to+4+balancer, which is likely used to redirect users to further malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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.cc/pify?keyword=factorio+8+to+4+balancer
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdf
    • http://files.casacarina.co.uk/uploads/1/3/2/8/132815003/6b8ec1e0.pdf
    • http://files.chelseamwest.com/uploads/1/3/1/3/131380601/9d4f8d04d274933.pdf
    • http://files.farmersandfamiliesforlivingston.com/uploads/1/3/0/7/130739146/fc651e56c2d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/31107182944.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/36971423372.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/93858229941.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/sosoketiwotoxul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/bazojizikobotatiximume.pdf
    • https://cdn.shopify.com/s/files/1/0430/4083/3690/files/tatudanedas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/jeropefig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/wonutalegikixomij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/61123743620.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/favurud.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057bd.bin
ed17b4891f91d0b1357234e1ea0b43cd804d7969ce0f3a8a3b10dbdae17eaf09
pdf-font-stream PDF embedded font (sfnt) at offset 0x57BD 4780 bytes
font_01_sfnt_off00006801.bin
fc055beec8e574906a5d9ca84801325ff22afab9b5dc77c81f2f402114a3b0b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6801 10144 bytes
font_02_sfnt_off00008aae.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAE 4324 bytes