Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7ef7e9754435f0…

MALICIOUS

PDF

42.1 KB Created: 2020-08-18 20:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eca7926fe0a9596bbf814680e7b388e8 SHA-1: dda7e63c049180ad27f919f58c51be64a9e21eff SHA-256: 0d7ef7e9754435f03e98ec3ea68c4c69b43050409c376e66ce1fc8891a745168
154 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'whatsapp app 2019 new version apk' and embeds numerous links. One of these links, 'https://ttraff.com/pify?keyword=whatsapp+app++2019+new+version+apk', points to known malicious redirector infrastructure. The document's structure and embedded links suggest it is part of a phishing or scam campaign designed to redirect users to malicious sites. No scripts were extracted, but the PDF's nature as a link farm points to a social engineering attack.

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=whatsapp+app++2019+new+version+apk
    • http://files.touchedbynangel.com/uploads/1/3/1/3/131397996/3838847.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7791/7090/files/google_maps_slow_android_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/40806120748.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/seluragogitifulafi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8377/5643/files/xigaketabatorake.pdf
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/17975321682.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/tarexozenun.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/gupudogifus.pdf
    • https://cdn.shopify.com/s/files/1/0437/5507/7790/files/kimorigiloxolelewefuku.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/assassin_s_creed_3_walkthrough_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/bright_angel_trail_guided_hike.pdf
    • https://cdn.shopify.com/s/files/1/0431/8543/8884/files/heroes_of_hammerwatch_sorcerer_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4202/9215/files/schneider_nsx_mccb_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/84250838334.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_off000063d8.bin
7056f6818c2127ae4e728596e9d50087feec81e40c489fe54e2f9b096d85a505
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D8 5588 bytes
font_01_sfnt_off000076eb.bin
69613bef971f80e90d5974836a15e4a9fdd80d8d4e6b7b77557d7739bdf07eae
pdf-font-stream PDF embedded font (sfnt) at offset 0x76EB 10592 bytes