Malicious PDF — malware analysis report

Static analysis result for SHA-256 16c8e524405f712e…

MALICIOUS

PDF

53.0 KB Created: 2020-07-29 10:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f893f7f3ebfb54db6f72dee108260a4 SHA-1: 7b2c2a68e089aefc542600f1512167f89291ac61 SHA-256: 16c8e524405f712e6a8630f49955d9c8f37ce265a124bf2056d9879b26188f86
154 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to create a link farm, with a primary malicious redirector URL. The document body, though heavily obfuscated, appears to be a lure related to "African countries and their capitals and presidents pdf". The presence of multiple external links, including a known malicious redirector, suggests an attempt to drive traffic to potentially harmful sites, likely for SEO manipulation or to host further malicious content.

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=african+countries+and+their+capitals+and+presidents+pdf
    • http://files.waindustrialsupplies.net/uploads/1/3/1/1/131163867/17bd03.pdf
    • http://files.evaatkinson.com/uploads/1/3/0/7/130776499/1314805.pdf
    • http://files.vetspouse.org/uploads/1/3/1/8/131858540/sumomevazuforiraloz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/92085567053.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/lonewufexodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1021/9422/files/suwovegotab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xogasetixudaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/80004646763.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vozazugimutiwobawaxuleg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/rorafixodusotipuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/46073943196.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/faparejefoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/89751755027.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_off0000839f.bin
64911821250cda1c4720f8a4e63dea54e092ea7429745491bcaa526a42c958eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x839F 5116 bytes
font_01_sfnt_off000094ee.bin
6652ac1398ced5060353058b1485af4770963c8ef6b4b2f936190502e4d4339c
pdf-font-stream PDF embedded font (sfnt) at offset 0x94EE 15380 bytes