Malicious PDF — malware analysis report

Static analysis result for SHA-256 727e9671333fd7b6…

MALICIOUS

PDF

41.1 KB Created: 2020-08-17 02:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9848e6bc02ad3d2ed37245656bdf63b2 SHA-1: 3eb7decd27f5aab231c97e0697f43634de3cc7c2 SHA-256: 727e9671333fd7b62ae1860315e9167f86e68252988344f93fb4f151f99b6032
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, identified as a 'PDF link farm'. One of these links, 'https://ttraff.cc/pify?keyword=aviation+map+apps+android', is flagged as a malicious redirector. This suggests the document's primary purpose is to direct users to potentially harmful content or infrastructure, likely for SEO manipulation 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.cc/pify?keyword=aviation+map+apps+android
    • http://files.stayblooming.com/uploads/1/3/1/4/131437174/nexowejozovabob-xelolopowu-kofuvo-kaxafaneka.pdf
    • http://files.arcadecoffee2go.com/uploads/1/3/0/7/130740483/4292509.pdf
    • http://dolem.vizadvantage.com/uploads/1/3/1/4/131482995/zixanosur.pdf
    • http://files.annapicklesharvey.com/uploads/1/3/1/4/131438427/6022432.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0405/8010/files/tamil_school_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/romunoxatiboparedogim.pdf
    • https://cdn.shopify.com/s/files/1/0437/6916/8021/files/anthony_brown_worth_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/88675909572.pdf
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/6205320316.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/gestion_de_la_cadena_de_suministros_chopra.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6444/files/jufexivexofepugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5393/1944/files/selutabuzid.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_off00006334.bin
20f26d319452c71d8ce6108fc728ff7f5fc2af539e8c5f49ba42378789372d75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 5120 bytes
font_01_sfnt_off00007482.bin
bcbe997647db2a80990cc8cfbe7278ac95b2348b6a3f5b4b6b61e05f175062a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7482 10420 bytes