Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd0c7a5f4f6788f…

MALICIOUS

PDF

39.4 KB Created: 2020-08-28 12:05:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1148a2b37d06fd509d929ccdfb712b63 SHA-1: 63f503489b54d14d292a072d13aa007cdd402c93 SHA-256: 7dd0c7a5f4f6788fd7504b999bb9aa1cb0cc2ecce5c7b15ed75bba2cc9da418a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link that points to 'ttraff.cc', which is known for distributing malware. The document body and embedded URLs suggest a lure for downloading content, likely leading to a malicious payload. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for 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=the+lazarus+effect+movie+download+in
    • http://files.xhingyuchen.com/uploads/1/3/1/6/131636665/kisipif.pdf
    • http://files.artexfurniture.com/uploads/1/3/0/7/130739831/xivagexezexanowe.pdf
    • http://files.movemoreeathealthy.org/uploads/1/3/1/6/131606537/fdc4ea0f4b9759.pdf
    • http://tusipu.alishaniaphotography.com/uploads/1/3/0/9/130969742/biferom.pdf
    • http://retanufaw.kmcrisisministry.org/uploads/1/3/0/8/130874493/3691272.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/resume_fill_in_the_blank.pdf
    • https://cdn.shopify.com/s/files/1/0436/0064/2211/files/55096110449.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3128/files/bulutosaponazozixajofuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/casio_fx_991_ce_x.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/15450210868.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/post_study_work_visa_open_form_nz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2029/6090/files/business_letter_format_ms_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/consumer_buying_process_model.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/absolute_value_equations_and_inequalities_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9147/7159/files/85316000788.pdf
    • https://cdn.shopify.com/s/files/1/0466/2309/6997/files/bike_hd_wallpaper_for_android_phone.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b1f.bin
3734e64cedbba4526e5fd8e431059442198fd0af684d7aedd92b8d832857a4c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1F 5412 bytes
font_01_sfnt_off00006d81.bin
092b226023c912785a62adfaf41190e1764c92e367bb83927ccfb7b12147fba8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D81 10252 bytes