Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74104dfb59c895e…

MALICIOUS

PDF

45.7 KB Created: 2020-10-12 00:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6e838249de9370618cf9bc407429c4be SHA-1: 7cb17ca8ab4ba98c3cc0ddd119f5948123646e94 SHA-256: b74104dfb59c895e3d09fefeeaa71013c582540796ad61fe53fd4dbf6159a26f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to malicious or SEO-poisoned content.

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=torque+mirror+shine+where+to+buy In PDF document text
    • http://files.fitbodybyphyl.com/uploads/1/3/1/0/131069875/nopefapigubozupurilu.pdfIn PDF document text
    • http://files.durhamyouthprograms.org/uploads/1/3/1/3/131380636/9423519.pdfIn PDF document text
    • http://files.thierryrmontoya.com/uploads/1/3/1/4/131437474/56cad9938c8e0.pdfIn PDF document text
    • http://suverid.cyclebavaria.com/uploads/1/3/1/4/131438044/87501fa7cd5fe6.pdfIn PDF document text
    • http://wafopikut.ccfoundationchi.org/uploads/1/3/2/7/132740837/8208244.pdfIn PDF document text
    • http://files.brooksidegundogsllc.com/uploads/1/3/1/4/131437107/ccb7462.pdfIn PDF document text
    • http://files.enlightenedhomemaker.com/uploads/1/3/0/7/130776617/adb6aa5228.pdfIn PDF document text
    • http://files.cffighters.org/uploads/1/3/0/8/130813777/duvetiwonebev.pdfIn PDF document text
    • https://site-1038416.mozfiles.com/files/1038416/52899198808.pdfIn PDF document text
    • https://site-1038338.mozfiles.com/files/1038338/figuvexixop.pdfIn PDF document text
    • https://site-1036823.mozfiles.com/files/1036823/66696255225.pdfIn PDF document text
    • https://site-1036921.mozfiles.com/files/1036921/miwodifobamas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3114/1783/files/bugagegafonutujilomip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/15277357099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8889/8973/files/77864031611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8344/5925/files/jc_penney_store_closings_list_in_michigan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3975/9263/files/nba_2k18_mod_apk_latest_version.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF4 5092 bytes
SHA-256: 58db36df4156f269afa5a7642168313b882858425570d2481cf70a3aaab14d11
font_01_sfnt_off00007c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C39 2012 bytes
SHA-256: 635ab073feb9f1310414136ae948304a01733549f1d864f5a10a2cf3fbc36a3f
font_02_sfnt_off00008597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8597 10528 bytes
SHA-256: dbe36e0e56243f7b6edc483a479a4bf893c5bfcf82fdf3eac45906d2619403bf

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