Malicious PDF — malware analysis report

Static analysis result for SHA-256 480bba5d220fea70…

MALICIOUS

PDF

40.5 KB Created: 2020-08-04 04:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1217c071ab96dab4c41457123b8740e SHA-1: 217a992f6410b7621157964929d58fdf09b413cc SHA-256: 480bba5d220fea70a1763d22f1f479c83a957df4c25a2453f5f9b1089ed45094
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=new+york+times+crossword+pdf', suggesting a lure to trick users into clicking malicious links. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.cc/pify?keyword=new+york+times+crossword+pdf
    • http://files.dappsinfintech.com/uploads/1/3/0/9/130969265/cca6a.pdf
    • http://files.nwscale.org/uploads/1/3/0/8/130813837/e97dc22001ec6.pdf
    • http://files.oregonfestivalforworldrelief.com/uploads/1/3/1/3/131383673/donokomizun_nexaxo.pdf
    • http://files.herbivoreresearch.com/uploads/1/3/0/8/130874559/remuku_xoninodasevijo_bexipipojozus.pdf
    • http://files.oakhillcontractorsllc.net/uploads/1/3/2/6/132682295/sitolamuladid.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/kugopamonotogaruno.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/56010775536.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/lufapowalabene.pdf
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/26787466492.pdf
    • https://cdn.shopify.com/s/files/1/0431/4277/4938/files/24868391188.pdf
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/sokanemufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/logilda._dll_could_not_be_found.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/ias_zoology_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3571/files/niganopogasaxokorenufon.pdf
    • https://cdn.shopify.com/s/files/1/0429/2008/3612/files/dovasasoduxetevefiwi.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060c5.bin
f879c2d28a1ff587ee32cc4d144c2fea323e14b4135803175851333a0b04113a
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C5 5288 bytes
font_01_sfnt_off000072d5.bin
e193ea6c2257919a6470f39b8a2d621feea68ef35f777176a3212f202ae4cdac
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D5 10060 bytes