Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4211b16a0c758e…

MALICIOUS

PDF

77.8 KB Created: 2020-08-12 13:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8894417f59dc8f8aea89a35037dc04 SHA-1: 39b6494f8c9fb5ae10d188ea133993298ab7bc29 SHA-256: 0e4211b16a0c758ef53f67e081c887d5c4c21128c5d655a65ada6515a73b4ce1
154 Risk Score

Malware Insights

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

The PDF contains a prominent link to a malicious redirector, disguised as a document about carnatic music. This URL is likely intended to lead the user to a malicious site or download further malware. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning tactic to increase visibility and traffic to malicious content.

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.com/pify?keyword=ragas+in+carnatic+music+pdf+in+telugu
    • http://files.scmofwi.org/uploads/1/3/2/7/132740362/jemefinapevemu.pdf
    • http://zuvegar.islandgalting.com/uploads/1/3/2/6/132681352/daserun.pdf
    • http://files.watervillefederated.com/uploads/1/3/0/7/130776562/54260891.pdf
    • http://lijenab.fwcmobridge.com/uploads/1/3/1/4/131407406/9236040.pdf
    • http://fewusak.wicksitslit.com/uploads/1/3/1/8/131857334/pebudadewamage-sosuserupegi-jelirimexuz-tubuvosarad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4984/3868/files/andre_luiz_nosso_lar.pdf
    • https://cdn.shopify.com/s/files/1/0435/9123/7791/files/wire_gauge_current_rating.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/consultant_interview_questions_and_answers_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/behringer_x32_compact_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/zedekukivezomegiropogep.pdf
    • https://cdn.shopify.com/s/files/1/0433/3761/3461/files/84453232746.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4483/files/3749238063.pdf
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/nogif.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/mns_blood_group_system.pdf
    • https://cdn.shopify.com/s/files/1/0429/4174/3263/files/kemiwenip.pdf
    • https://cdn.shopify.com/s/files/1/0430/9126/3649/files/ending_consonant_blends.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_off0000e776.bin
d4158c7b526e5c885a7a355acd802a5b028c9ae2785b64ab46d6dff570277a64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 5256 bytes
font_01_sfnt_off0000f93a.bin
3a11525b036f957a7ea504d14c957560577e1e7990337c54ec321e46821182f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 10056 bytes
font_02_sfnt_off00011ba2.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA2 4324 bytes

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