Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fdbe8c18b22156…

MALICIOUS

PDF

40.2 KB Created: 2020-08-15 02:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c989637dab4b14e82c4209fa0804cdb1 SHA-1: 8e19dd960bb63f5611a8aeae56f55dd16a3ffb0d SHA-256: 80fdbe8c18b22156a483722585fc3d6e96838c9a6cd8de626497ec2c578bbbff
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for malicious redirector links, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains similar URLs and text suggesting a lure for 'electronics service manuals'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The primary attack pattern involves tricking the user into clicking a link that leads to malicious infrastructure, likely for further exploitation.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wb?keyword=electronics%20service%20manuals%20online%20free
    • http://files.applied-magnetics-shop.com/uploads/1/3/1/4/131406173/fd9b52c7a.pdf
    • http://kimetepu.uscgminf.com/uploads/1/3/0/8/130813533/navisasudale_nuxojedujenuzu_pilakaxoti_fupufe.pdf
    • http://files.brazeldazzlestudioz.com/uploads/1/3/0/9/130969200/dalekuk-faburenoteje.pdf
    • http://vigise.mrdickson.net/uploads/1/3/0/9/130968921/6baad464.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/89755807424.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/70668863987.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/49436210303.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2792/files/wexitizibojofuku.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/idle_town_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/68513135127.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/carta_de_apresentao_de_empresa_para_empresa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72905654063.pdf
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/92757929429.pdf
    • https://cdn.shopify.com/s/files/1/0452/8501/5714/files/neurologia_veterinaria_libros.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/68545090756.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f8c.bin
5803ab07afc82c641d327795fba08617b3dd0781093267735125a29ad9704ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8C 5044 bytes
font_01_sfnt_off000070a4.bin
91ea48162f5d4b691a872eabf17ea008c7c4b8a68863d5bd6f7fbb997560b190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A4 10604 bytes

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