Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4edfb13363a227a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 08:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 113facd3617e09fc43c7f9e73c61190d SHA-1: c4121ec9409ea8d31c8d8a80712c88385f3a246c SHA-256: c4edfb13363a227a072a1740fcd2d8f427dd38b9d1487d360322f33b6ebb4bd1
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=rauf+faik+childhood+song++pagalworld', is known to lead to malicious redirector infrastructure. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to lure users to malicious content. 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.cc/pify?keyword=rauf+faik+childhood+song++pagalworld
    • http://files.casaranovascotia.ca/uploads/1/3/1/3/131379183/vexopifuxakopo.pdf
    • http://rejowa.hopegoodells-lcms.org/uploads/1/3/1/6/131637257/vuvapamititif-gavasujojomoj-dujogimoxijulax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9162/files/1459714597.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/491262379.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/94510482411.pdf
    • https://cdn.shopify.com/s/files/1/0462/0084/8537/files/26350733774.pdf
    • https://cdn.shopify.com/s/files/1/0437/0815/4008/files/42539305224.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/44497663085.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/87728970944.pdf
    • https://cdn.shopify.com/s/files/1/0434/0809/7436/files/mulovoputiriwabozupana.pdf
    • https://cdn.shopify.com/s/files/1/0450/0806/0574/files/ornamental_horticulture.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5148/files/vikep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045d8.bin
f3d7c3e435e8a4903e87b438374a0d48366a59a5a0c5428de7e016ab09dfbbec
pdf-font-stream PDF embedded font (sfnt) at offset 0x45D8 5580 bytes
font_01_sfnt_off000058e9.bin
9eaddcd31e9e52ab693f4d98eebabad4b2548248b6feca3ce349a0a37b2f4f79
pdf-font-stream PDF embedded font (sfnt) at offset 0x58E9 10256 bytes
font_02_sfnt_off00007c3d.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3D 18776 bytes