Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4a961fa6cf03b6…

MALICIOUS

PDF

54.0 KB Created: 2020-08-13 22:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d95d0af053808e7b8eb9c07f7f7cd3d SHA-1: 61314c984670f991f8ccbfa68f1e1351f0669957 SHA-256: 0c4a961fa6cf03b6af1520e6eaa715930ce0cfff2aa6a39dfdbd4e4f86fbc3c7
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, ttraff.com, which is used to serve the lure. The document body text, though heavily obfuscated, contains the phrase 'Tamil 720p movies online', indicating a lure for free movie downloads. The presence of multiple external PDF links, many hosted on Shopify, suggests a link farm used to distribute the malicious content or to improve SEO for the lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.com/pify?keyword=tamil+720p+movies++online
    • http://files.intucoaching.com/uploads/1/3/1/4/131438477/kigixi.pdf
    • http://pefijiko.stephanieteresesimonmusic.com/uploads/1/3/0/8/130814729/45ab8bbe1e96.pdf
    • http://files.theinstituteofadvancedmedicalesthetics.com/uploads/1/3/2/6/132682048/lazelotemep.pdf
    • http://files.jasminkwan.com/uploads/1/3/1/4/131453248/kubomerebamel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/xovutetigogiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6390/files/85251496411.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/dimuzejabixujatiwusun.pdf
    • https://cdn.shopify.com/s/files/1/0447/7534/2246/files/91239556833.pdf
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/87170279371.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/6378813586.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/36583019121.pdf
    • https://cdn.shopify.com/s/files/1/0434/9650/5496/files/zakas.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/40182338165.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/ipod_touch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/91937361079.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e6.bin
27b748ee931503da7bbd748c21e6b962001e2b36dc9ea055ea975387d771fc72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E6 3212 bytes
font_01_sfnt_off00007065.bin
207a59b21ae58450ad7604dc09b3d89364301b74727425cb7889ba2d139622e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7065 5232 bytes
font_02_sfnt_off00008229.bin
f586088d676df47726e3c3d2816af51f0559e1faa1a0751ab93178669a4d4a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8229 4048 bytes
font_03_sfnt_off0000904c.bin
3f2c0e7097b69e18e1f5e3b124cbf2a326dc45de794477a882e304f71329c604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904C 10632 bytes
font_04_sfnt_off0000b4e8.bin
f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E8 16164 bytes

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