Malicious PDF — malware analysis report

Static analysis result for SHA-256 112d72c22dcc42b2…

MALICIOUS

PDF

46.8 KB Created: 2020-08-30 13:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d84781d791e6fffb1f90f06bf5008f07 SHA-1: 3a8e513d7fdecb6babe23a38900fcd7126f53060 SHA-256: 112d72c22dcc42b205907b1f8da948d265d3dd6f5422d5a146021a032b2d9375
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to educational material and includes the malicious URL. The presence of many links, including those pointing to Shopify, suggests an attempt to disguise malicious activity within a large number of seemingly benign resources, a common tactic for SEO-based link farms.

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/wix?keyword=french+revolution+class+9+pdf+ncert
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/calculus_3_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/mazamidavosidufapoduzoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/lakawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/lakixajenak.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e1b23471f6f4d3e8f2d2802ff2bfa3d.pdf
    • https://static.usrfiles.com/ugd/38bf1f_f5fefe35c9644a86882a8c5e224925b6.pdf
    • https://static.usrfiles.com/ugd/429b25_9e2e572437ae4db1b105fb3881cf220e.pdf
    • https://static.usrfiles.com/ugd/b8c837_12f9d3d6161947c6aca4565ed9c2ee0d.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5176/files/dc_metro_system_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1706/files/kuzinefajasiromefevilu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3141/9287/files/89676686481.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/56805867494.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/wodaxezanubokamikosepu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.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_off00006c45.bin
d8516e8b720099194dbb7d61592b15b7a11d15fa410ce175de076a733df447e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 5412 bytes
font_01_sfnt_off00007ea6.bin
323e6d543d97256c8c600212a68f5454c7d1d97bcbc87592a02c299c4a2b92eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA6 10492 bytes
font_02_sfnt_off0000a29d.bin
fe4c9fcc47d4567f3108bb0313c452c233faca77fa8cf177a17abdf89989c8d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA29D 2748 bytes

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