Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b49f552d3d81f14…

MALICIOUS

PDF

56.7 KB Created: 2020-08-14 15:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f540c34b57d2e59053aa87ca24dc12e SHA-1: d76770157393194a8b47015aa0b46b8762baaefb SHA-256: 6b49f552d3d81f14b1c0bb6e813360d0a0fd4a09ed00ad63e80ba1d4c82109e6
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting a phishing or scam attempt. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=interpersonal+social+rhythm+therapy+worksheets
    • http://files.nltcassville.org/uploads/1/3/1/1/131164573/1077851.pdf
    • http://vesevaw.grovelyridingcentre.com/uploads/1/3/1/3/131380081/2878744.pdf
    • http://jidiratut.openmindspromotions.com/uploads/1/3/0/7/130740596/1801337.pdf
    • http://files.or.honest-elections.com/uploads/1/3/1/3/131380482/1497582.pdf
    • http://fukabev.darkpoetry9.com/uploads/1/3/2/7/132741615/5773589.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/3276/2785/files/pdf_to_cdr_file_converter_software_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/42147414754.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/bach_minuet_in_g_major_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/voluw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/37959893219.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/gemepasovatikud.pdf
    • https://cdn.shopify.com/s/files/1/0436/4537/0518/files/65593755193.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/80240217651.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_off00008c8c.bin
0c007fe8772aacf4702601775ce6263d305403c4531874bc06d5733fa7fe2275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8C 5156 bytes
font_01_sfnt_off00009de3.bin
13234e9b1b0f4775c0cdf1cc6d8be0fb50538876697e2a4d603ea2df5932775b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DE3 12964 bytes
font_02_sfnt_off0000c6f6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F6 4324 bytes

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