Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5eaad1b3c2b789…

MALICIOUS

PDF

46.5 KB Created: 2020-07-25 13:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fe3ddd7518d2aee9d5275c8ba7aa1e2 SHA-1: a0ce69c1e14fb5e0477b2621ea875326c117ec21 SHA-256: 7e5eaad1b3c2b78973565a81b8053e1cef11ed67d366f17279dc507e9624f8c1
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as an invitation template, which redirects to a known malicious domain. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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=invitation+birthday+template+word
    • http://files.college-elf.com/uploads/1/3/1/4/131407051/nafife.pdf
    • http://files.thelittlehelmetman.org/uploads/1/3/2/3/132302982/nazovoge_bumivur.pdf
    • http://files.videopeople360.com/uploads/1/3/1/8/131856285/lokasewelox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/fopofimituxesobipijil.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/14236656176.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/tikoviruduruseg.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/gupunekokoratiwoveranu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/meretivufoditi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1576/6177/files/mazexalaxozazogaxok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/8357326041.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/66832181413.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/puladibajoxifenelojaxures.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/96030333250.pdf
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/7566063798.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/jefetip.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007956.bin
0d01acdbd2f34ea684eced5e9d8111742e211235c26835863dac8ed9c8b1c264
pdf-font-stream PDF embedded font (sfnt) at offset 0x7956 5140 bytes
font_01_sfnt_off00008aab.bin
064cee05074794d80cea2732cf2028110705ede4682e3159dc9dbffaefb4f4c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAB 10088 bytes