Malicious PDF — malware analysis report

Static analysis result for SHA-256 76617a82906eb767…

MALICIOUS

PDF

43.5 KB Created: 2020-07-19 05:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82c4fe24e440d20f9c03a754dd824ac8 SHA-1: de4e37ad723cc1dbde56c4108744d4162ba1a361 SHA-256: 76617a82906eb767d1db239ee16ca9b4030d258493876b89ef509f112137545e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to educational materials ('adjective worksheet pdf grade 6'). The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a malicious redirection or phishing attempt.

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/wb?keyword=adjective%20worksheet%20pdf%20grade%206
    • http://files.belarte-ardeco.com/uploads/1/3/0/8/130814065/padutu.pdf
    • http://files.mschwindtphotography.com/uploads/1/3/1/6/131607005/fawibe-lavizilifak.pdf
    • http://files.islandscounseling.com/uploads/1/3/1/4/131409055/8e3ce1394.pdf
    • http://files.foxwoodequestriancenter.com/uploads/1/3/2/7/132740498/795868.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/negamixinikumotixuvud.pdf
    • https://cdn.shopify.com/s/files/1/0433/5127/7726/files/widejis.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/misajisowozodefaludeson.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/dufodugukoxatugazot.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/3776221561.pdf
    • https://dafowamu.files.wordpress.com/2020/07/pamokifasoluzuzamedunumaw.pdf
    • https://sebowokulu.files.wordpress.com/2020/07/96253018996.pdf
    • https://datoniv.files.wordpress.com/2020/07/gibenovetojizemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2956/9429/files/pezavukekovokozapavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/32027611349.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/6507014678.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/91718318771.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0434/7166/7352/files/tozezusomilibodab.pdf
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/81822985379.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/test_1879eb6a-339e-4d45-a409-571cd94a4742.pdf?v=1594212285
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c18.bin
0dd7305fdc4e2aa904fe3d49dd1b0843be2e45246607b93a51595b88174b8001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C18 5500 bytes
font_01_sfnt_off00007efa.bin
994a4d9ec5b1c89a5a1dedf49a483d78d3e92b572d6666a13475804110cafdc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EFA 9836 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.