Malicious PDF — malware analysis report

Static analysis result for SHA-256 179c625d8337c512…

MALICIOUS

PDF

49.1 KB Created: 2020-08-10 07:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8da8ccb80937f45fd80c3e275a9c56f5 SHA-1: 3d507072defae9c1b216b6cdcd51e82db03c6c23 SHA-256: 179c625d8337c512b881241ee48401702eeb3ad18e65743280e73937f008e638
162 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 a malicious redirector. The document body and embedded links suggest a lure to download or access content, with one URL specifically identified as a malicious redirector. The presence of many external links, including a large number of PDF links, indicates a link farm designed to drive traffic to potentially malicious sites.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vce+to+pdf+converter+freeware
    • http://files.apartmentwasherdryer.com/uploads/1/3/1/4/131406827/6950515.pdf
    • http://files.texasredtoypoodles.com/uploads/1/3/0/7/130738673/gikibaz_wosixupemubawer.pdf
    • http://files.hourglassdevizes.co.uk/uploads/1/3/1/1/131164556/xevezanel_rotuzakitoko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/5837127332.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/36566506262.pdf
    • https://cdn.shopify.com/s/files/1/0437/4147/9066/files/srimad_bhagavatam_canto_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/archimate_specification_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/kakijadaseravuxalimodaxir.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/bitilifovekudujarijito.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/51591548471.pdf
    • https://cdn.shopify.com/s/files/1/0436/7358/3781/files/19158367182.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0901/files/kupipu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/derevopovilumaduwukumur.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_off00006e5a.bin
6395f435a518c21e6616670d0ddcf0557be37b3a875b61e3cc174af099093496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5A 4796 bytes
font_01_sfnt_off00007ebb.bin
725b6bcca5f08555b5f5ed4d49d4c9f845aa04500bda685e845259b19f6551d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBB 12972 bytes
font_02_sfnt_off0000a7b6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B6 4324 bytes

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