Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c236fb3cbd57947…

MALICIOUS

PDF

76.8 KB Created: 2020-09-21 03:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61831bc16703804f9eb212763439fc5e SHA-1: 773be9a5c0c3e678efb53c90ab32664473afdb66 SHA-256: 0c236fb3cbd57947e3f146dde09143ca51df94c43c3cf7d1a78e289436dad5d3
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains and are flagged as part of a link farm. One prominent link, 'https://ttraff.club/wix?keyword=hazaras+and+pashtuns+in+afghanistan', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs, suggesting an intent to redirect the user to malicious content, likely for SEO poisoning or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.club/wix?keyword=hazaras+and+pashtuns+in+afghanistan
    • http://bunor.littlefeetchildcarecenterkatonahny.com/uploads/1/3/1/8/131857252/girisevewazilen_tisivabajivati.pdf
    • http://files.thevioletvalentine.com/uploads/1/3/0/9/130969663/2642340.pdf
    • http://files.donrayart.com/uploads/1/3/0/7/130776182/4c26ad.pdf
    • http://jomefoj.cebuanohomes.com/uploads/1/3/2/7/132741615/7300401.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://595139a8-5a91-4d7c-9278-d3bc67e70f09.filesusr.com/ugd/54e393_01f605dc1cc84faa854d11e63a7119ba.pdf?index=true
    • https://faf34da3-d343-4140-aea5-bace8b9594c3.filesusr.com/ugd/c34aa9_bc1e83df487c4b36b33f8f7df04580ae.pdf?index=true
    • https://1e6a2c2f-f69e-4461-8357-a616bfd4c10a.filesusr.com/ugd/a838c0_347f26254ddc415c8873fa5451e0e163.pdf?index=true
    • https://f004270b-e3bd-469c-b6c6-ac6ee743e6f5.filesusr.com/ugd/1b9faa_9787b281edaf4db19d3bb8b8cdb9a1fb.pdf?index=true
    • https://90ae18cc-bd1d-443b-8abc-c895adcbaa77.filesusr.com/ugd/bcd086_4fa7737ce7004fdb97c1d02fd5170378.pdf?index=true
    • https://e97b7f89-57ac-4694-bd79-9807947ab3fc.filesusr.com/ugd/e4a001_23957a824dfa4bb89e1cb6cefd6f6d4a.pdf?index=true
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2f0.bin
333aae7c17e4bb70b1c23c8e5e83d25d00f668b14a10fa48e2cd2f969a76df96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F0 4936 bytes
font_01_sfnt_off0000d3a1.bin
aadcc6ddb7e5a7e1bf34167babe1eadf6aff6fdd4688ca1582b2255ac5cbf9f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A1 10596 bytes
font_02_sfnt_off0000f813.bin
ce5748dcf444196bb0ec5a2e1c079ec66f308b80743c67145ddcfd6247a16602		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF813 19612 bytes
font_03_sfnt_off00011848.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11848 4324 bytes

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