Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef05167d36210a5b…

MALICIOUS

PDF

50.5 KB Created: 2020-08-11 08:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0cde8cdcf60177969ff755772d3ef15 SHA-1: f2d6d0900a391c67c444b0a5795195a48368561d SHA-256: ef05167d36210a5b7662dbb61b435c2f64ecc6afea43ce8dba56d0ba59997fc7
152 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with the primary redirector identified as ttraff.com. The document body and embedded links suggest a lure related to 'Android apps tutorial bangla pdf', likely intended to drive traffic to malicious or potentially unwanted content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=android+apps+tutorial+bangla+pdf
    • http://podum.innatpelicanbay.com/uploads/1/3/1/3/131380600/201526.pdf
    • http://files.ctk.net/uploads/1/3/1/4/131408899/ce54fb0.pdf
    • http://files.equistable.co.uk/uploads/1/3/0/8/130874287/wufozixivivowuzem.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/83570750241.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/8550597845.pdf
    • https://cdn.shopify.com/s/files/1/0431/2911/0685/files/85260355359.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/lodovolinopivem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/12485480134.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15900382268.pdf
    • https://cdn.shopify.com/s/files/1/0438/6593/1936/files/80550655606.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/bloodlines_book_2_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/38959425548.pdf
    • https://cdn.shopify.com/s/files/1/0431/1567/5809/files/90556847475.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/49958036298.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2418/files/nepoxigojemirup.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056cf.bin
2eb7b9dcde8c98ec1dea8b14c6967f88eef08874d252e601e4978f9574efcce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56CF 5336 bytes
font_01_sfnt_off000068f6.bin
ff2aaa604e8801832c32d4cff37866b91f8a645634fe4627a452c899a1328b25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F6 8068 bytes
font_02_sfnt_off00008255.bin
629d71c292c0da1d321ee15855e868cb680135265baa9687e12736ecfcd6fbf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8255 10688 bytes
font_03_sfnt_off0000a6e2.bin
8034750be9d61617e974819f193187ffc52cdde98fabd70584d9e453dc232515		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6E2 16336 bytes

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