Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a76a359a115d397…

MALICIOUS

PDF

46.5 KB Created: 2020-08-14 21:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 083591e6f221eeabf47baaedaad0d458 SHA-1: 9b362490cff30e8d1129030e5a3494a2b763e7a8 SHA-256: 5a76a359a115d397b1fd853f3df4b437fa863fde55b73c1cf16e5b9eac1459a4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=berlitz+japanese+phrasebook+pdf`. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the presence of malicious redirector links points to a phishing or malware distribution attempt.

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=berlitz+japanese+phrasebook+pdf
    • http://files.brettraio.com/uploads/1/3/0/7/130776594/79719.pdf
    • http://genurune.nevacochranrd.com/uploads/1/3/1/4/131437626/wedijutopafesifowid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0452/5110/0829/files/amelie_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/ayatul_kursi_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/rukubibopulobaviteka.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/systematic_theology_grudem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/sesezibaxojagizanurewumel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/lunisuwubed.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/89131196563.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/mivulejakuxovurogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/88938354181.pdf
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/varieties_of_narrative_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/28884283782.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_off000065fa.bin
0c023aaf9b3fd4524c7ea3c61f45e0e148b734c8b0264cb8a872f34939c2b35d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 4644 bytes
font_01_sfnt_off00007665.bin
435c7b744e6d99cfb4c3dbe1b6b9316c219a3158129e568109f4b2877c4d31be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7665 5508 bytes
font_02_sfnt_off00008919.bin
8d29d18119f9a9be842683f145ba3f2b2e402950a1374035f8d2c4e134cd2091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8919 10516 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.