Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe7cd171f0dc95b…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 11:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c88be18dc2865c788b9e3b8156c587ae SHA-1: 3270d9ffee0aa832868ffba67f4eabf53558a597 SHA-256: 5fe7cd171f0dc95b12ce205ad6cbb6cf53535ef5d52491e218b8e81162a6553e
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content, but the primary link redirects to malicious infrastructure. The embedded URL `https://ttraff.cc/pify?keyword=avakin+life+hack+apk+happymod` is a known malicious redirector. This suggests the document is a lure to drive traffic to potentially malicious sites, 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.cc/pify?keyword=avakin+life+hack+apk+happymod
    • http://files.findingthewriterwithin.com/uploads/1/3/0/7/130776015/4641703.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/7122/1410/files/59529762414.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/xoguvifegadobegu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/51591517583.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/30962315999.pdf
    • https://cdn.shopify.com/s/files/1/0432/7355/2028/files/40013875457.pdf
    • https://cdn.shopify.com/s/files/1/0430/1701/1353/files/nidazoxukemisujefaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/fumoxubakunefafagotarorux.pdf
    • https://cdn.shopify.com/s/files/1/0437/5996/0218/files/canterbury_college_uniform_policy.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/edema_pulmonar_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0437/5078/5173/files/caderno_de_caligrafia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/volvo_xc_90_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/limebuzugirexasi.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_off00005c75.bin
f0fa1e0f160a48a242569ea7dc8ec9298c7ea0f371bff341b67129d4b72178ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C75 5336 bytes
font_01_sfnt_off00006e81.bin
1fd3ad16cc9b19c876e2cffeee2b73bee0de5c027c9db45b2728fe27772b7c5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E81 14652 bytes