Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab12f1f1fd9b5c4…

MALICIOUS

PDF

34.5 KB Created: 2020-10-06 20:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4bd4b71144b750895938640ea03800b7 SHA-1: 4c65775b5a6aac098bb4a716d5dd266e535fa84f SHA-256: 8ab12f1f1fd9b5c46925fd6b5c6846edefdef25ac7148b203b4bc1cbba653f30
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body and embedded links suggest a lure to download content, which is a common tactic for phishing or malware distribution. The presence of numerous PDF links also indicates a link farm, likely for SEO manipulation to drive traffic to malicious sites.

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://ggtraff.ru/strik?keyword=tom+and+jerry+hindi+dubbed+download In PDF document text
    • https://site-1039804.mozfiles.com/files/1039804/20374649221.pdfIn PDF document text
    • https://site-1039639.mozfiles.com/files/1039639/30273488880.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/86472404330.pdfIn PDF document text
    • https://site-1036830.mozfiles.com/files/1036830/golofatevonepobinaxamodox.pdfIn PDF document text
    • https://site-1038391.mozfiles.com/files/1038391/79769766150.pdfIn PDF document text
    • http://ximipef.pikecountyin.org/uploads/1/3/1/4/131407535/pajafuvas.pdfIn PDF document text
    • http://getosa.wekeepyoumotivated.com/uploads/1/3/0/7/130739287/6037708.pdfIn PDF document text
    • http://files.maisonsouthernfrance.com/uploads/1/3/0/7/130739664/panupufogipul.pdfIn PDF document text
    • http://bikebetas.emilydunlop.net/uploads/1/3/1/4/131407164/mupijew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4870/9525/files/jadenowupumapofejurisig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3662/5064/files/sample_letter_explaining_bad_credit_to_lender.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0923/1006/files/83197694673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/advanced_chemistry_oxford.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1186/1412/files/goldfish_fin_rot_medicine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3477/4174/files/sony_str-dn840_remote_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8467/9842/files/layers_of_fear_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7811/4727/files/54811159033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/husky_power_washer_manual_1800_psi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4855 5248 bytes
SHA-256: 66b71ec9be713af87eb487a9e4e893d785b08c51ab4708aed9146a00e14ab223
font_01_sfnt_off00005a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A15 10232 bytes
SHA-256: 2177e92663cb554351d314aa56d2740a365fa2e10d7b9c61a0032564d12f5929

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