Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3b56a0cf379d5f…

MALICIOUS

PDF

61.6 KB Created: 2020-08-16 18:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57bbbafddc7d529c4194e907e026756d SHA-1: 8f917de424bbcecfe5564f3a398272b8c7a154f6 SHA-256: 5e3b56a0cf379d5f616bbd4f7c7e9275c4b35a41cef4acc4366f223ecb983120
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=guider+in+arabic', which is flagged by heuristics as a malicious redirector. The presence of numerous PDF links suggests a link farm or a phishing attempt to lure users to malicious sites.

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=guider+in+arabic
    • http://vomel.chiquiaull.com/uploads/1/3/0/7/130738850/bc53f7e4d.pdf
    • http://files.wanawari.org/uploads/1/3/0/8/130874055/tebazudojedulerep.pdf
    • http://fiwuv.campranchoframasa.org/uploads/1/3/1/1/131164239/kejiromugadakav-xudalaga-bikil-jufawuzazorumo.pdf
    • http://files.gmitletterfrackresourcecentre.com/uploads/1/3/1/4/131406473/34756bae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0432/0883/5229/files/vizio_vx_32l.pdf
    • https://cdn.shopify.com/s/files/1/0438/5076/0357/files/outbreak_undead_core_rulebook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/73640921773.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/recursive_fibonacci_java.pdf
    • https://cdn.shopify.com/s/files/1/0441/1277/3272/files/22303263274.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/wadabugagovulunoduxer.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/jowubolasiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevimija.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/juvixano.pdf
    • https://cdn.shopify.com/s/files/1/0448/0575/0946/files/dnd_college_of_glamour.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/ludilifinarukepixefef.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/all_creatures_great_and_small_summary.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000baed.bin
598291b7d1621a49181fbbbfe4756b8ef17237579e4653e1332f8318398ca45e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBAED 25956 bytes
font_00_sfnt_off0000558c.bin
1c7b7d7e758b735cd80386463d072bd5a0ba70a63d6df2cc752e94de75df6591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558C 8892 bytes
font_01_sfnt_off00007354.bin
9747354fc6183d01b7603fbc3760b5762150131a2f29b9425c254a9763691c7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7354 4892 bytes
font_02_sfnt_off000083eb.bin
d002e643705b43bf06ee6600987b52e6cb523997c196ffcc05b73dc8adbe17b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83EB 8044 bytes
font_03_sfnt_off000099f2.bin
3618ddfb9a4eb73100556a6ff33225b2b6a02c9ff570961825699793612cefa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F2 10200 bytes

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