Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1127677bff91a0…

MALICIOUS

PDF

56.3 KB Created: 2020-08-13 07:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccfe04b48c7cd44864d0bd982fafa3b7 SHA-1: 20578c72562c383c69e0782e9e109e158a5ae5a1 SHA-256: 6f1127677bff91a0f16993fd65ecc747be77c6d7e66387624cf3e8384834f63c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or SEO poisoning attack. The primary malicious URL, 'https://ttraff.cc/wb?keyword=jcb%203dx%20specification%20manual', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF links, reinforcing the lure to external 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.cc/wb?keyword=jcb%203dx%20specification%20manual
    • http://files.gordon-setter.pl/uploads/1/3/0/7/130776363/mamixukori-wulun.pdf
    • http://files.brgaustralia.com/uploads/1/3/0/7/130775306/munanu.pdf
    • http://files.bdupottersguild.com/uploads/1/3/0/7/130739919/8547002.pdf
    • http://files.srcharleston.org/uploads/1/3/0/7/130739542/samowidi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/69049899394.pdf
    • https://cdn.shopify.com/s/files/1/0437/2630/7480/files/bugopavi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/anatomy_of_forearm_and_hand.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5314/files/employee_transfer_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/53901677736.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/tifabevibomenitaponaje.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/32972559485.pdf
    • https://cdn.shopify.com/s/files/1/0429/2512/9894/files/813262723.pdf
    • https://cdn.shopify.com/s/files/1/0437/2535/7206/files/gebowodalozurafezaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5172/9567/files/betteridge_s_law.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/riwawikabijutirurenin.pdf
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/pofekebofud.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/35870593121.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_off000084aa.bin
35ab6b498872696c8d75b76974c55ad4975edac5ce1a9c06ee63a0251f797dea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AA 5448 bytes
font_01_sfnt_off00009711.bin
0e6a1f9c8bd27b9086d5bd81a66e59bbf917550e14b87d261d458008075b5b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9711 15316 bytes
font_02_sfnt_off0000c653.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC653 4324 bytes

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