Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daa9adfa023855d…

MALICIOUS

PDF

45.8 KB Created: 2020-08-25 03:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3150666be395d970af4c66adea2c738 SHA-1: 20cbf6f36a8525077047c19d112d45c58fd972cf SHA-256: 5daa9adfa023855d51196eeabdd3c120527d7efdbb0181fa3e56ed2d42a1f406
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for 'Game for windows live client', suggesting a phishing or scam attempt. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or distributing 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.cc/pify?keyword=game+for+windows+live+client
    • http://files.ironantlerforge.com/uploads/1/3/0/8/130815026/demisuzumulelabosis.pdf
    • http://gotukiz.joanneholtje.com/uploads/1/3/0/8/130814674/e0fedd65f2fae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/delete_line_vi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/bcom_hons_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/87425350701.pdf
    • https://cdn.shopify.com/s/files/1/0431/8288/2980/files/tongue_twister_activities.pdf
    • https://cdn.shopify.com/s/files/1/0441/3489/1672/files/edge_barracuda_buggy_plans.pdf
    • https://cdn.shopify.com/s/files/1/0438/3870/1728/files/pubg_awm_gun_sound_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0437/9397/3405/files/xigazexekek.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/simple_newsletter_template_html.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/cement_plant_equipment_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/8311/2341/files/92835991542.pdf
    • https://cdn.shopify.com/s/files/1/0462/4357/8007/files/rojufakapajevafuge.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_off0000759b.bin
c62066d5c67ee6d877d595fb69583f62faf48c00410b2ef49de5c5bab512a5ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 5352 bytes
font_01_sfnt_off000087d7.bin
5ee7a0b7a54c2a9e090e73cc23e1bdef414a950313f47368a712010658e70424
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D7 10068 bytes