Malicious PDF — malware analysis report

Static analysis result for SHA-256 6376e553cdbe4d40…

MALICIOUS

PDF

116.2 KB Created: 2020-08-13 21:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b779a6f14b4464847b87d3841bcc8af7 SHA-1: fcde72a93a0228f857b7aee6257c6cb324b49d57 SHA-256: 6376e553cdbe4d4087008ec6de75a88138af16d6fbee757323d3ea6817806d9f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=equus+africanus+asinus+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous external PDF links. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to lure users to malicious infrastructure, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=equus+africanus+asinus+pdf
    • http://files.neilbuanarchitects.com/uploads/1/3/2/8/132815343/wasim.pdf
    • http://files.dearborn411.com/uploads/1/3/1/4/131453735/75f39540d26fbf.pdf
    • http://files.gailgilmoreceramics.com/uploads/1/3/1/4/131438397/rutibuwobazokudaxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/49589704942.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/fobapuwelezupikawadamolut.pdf
    • https://cdn.shopify.com/s/files/1/0437/8791/1319/files/tisutubezadigigilamasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/13552572016.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/15512477227.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/be_all_you_can_be_john_maxwell.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/8193922881.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/drudge_report_feed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/xefipinere.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/37728352369.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/72138147751.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • https://gitlab.com/smc/meera/blob/master/COPYING
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_012_off00019bd9.bin
af2c8cbf305a70d67e8189c2bc155026509677ea798bde29d4445c9612d320cf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19BD9 21472 bytes
font_00_sfnt_off0000f18f.bin
fd998f469932a356d69ff88e72c7c54be283717d5a9e68cf8f555d69e064c82f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 6560 bytes
font_01_sfnt_off00010849.bin
121f1041f1c3b2392c1c3c937b0cc5b056aeb868d045048a0656096f46edfabf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 5200 bytes
font_02_sfnt_off000119fd.bin
9f2551b5e42dba5dd7e94cfd32243d38d9179b8d1a3c63d631ac48eb30037cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119FD 3452 bytes
font_03_sfnt_off00012740.bin
3be2d3040db16d025ddf45567046b168f29b86043011fce62d82df6b8b555933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12740 3980 bytes
font_04_sfnt_off00013683.bin
6759c27010ce147157f808b010cf6b9db03229c8b5cb51e0d40fe8a94eb07f45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13683 3020 bytes
font_05_sfnt_off0001430a.bin
f35666e3f5ef0c3be5cd897f04a8f0b91e0302023e312e06f0ed8ca934f4769f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1430A 2872 bytes
font_06_sfnt_off00014f12.bin
0da469baa2db4af63515a7cf94b47b0e326b170b51d17e866a28d8bbaa6edeed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F12 6464 bytes
font_07_sfnt_off00016006.bin
cb1864e6da4e76d385eb309b9a3994d568a0affb436e75f966c754597371d34b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16006 21312 bytes

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