Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c630043ca03313…

MALICIOUS

PDF

49.6 KB Created: 2020-08-21 19:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb26d9611a42991f628efb7501480e1a SHA-1: 1581881c83b60dab033a73da325320c606c0ac89 SHA-256: 39c630043ca033132ef6715345f3d17b3af0eade21c62bba7a83e06f027d3276
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that initiates the redirection. This suggests the PDF is designed to lure users into clicking the link, leading them to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=performance+evaluation+report+format
    • http://files.bandsourceproductions.com/uploads/1/3/1/4/131437056/c826e9743264.pdf
    • http://files.treshaimsportfolio.com/uploads/1/3/1/8/131871980/1442450.pdf
    • http://files.kristysinsara.org/uploads/1/3/1/3/131398144/takotine-lodapetubav-dulogikur.pdf
    • https://cdn.shopify.com/s/files/1/0435/0181/3915/files/cnrn_exam_secrets_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0449/9360/9896/files/cumulative_density_function_of_uniform_distribution.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/cellular_physiology_of_nerve_and_muscle.pdf
    • https://cdn.shopify.com/s/files/1/0430/0007/0307/files/baar_baar_dekho_video_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0434/4895/9141/files/muslim_baby_girl_names_with_meaning_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/88252053369.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/jarogakovev.pdf
    • https://cdn.shopify.com/s/files/1/0449/2728/7451/files/chennai_google_map.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/vilubozazebovuzujibodulod.pdf
    • https://cdn.shopify.com/s/files/1/0447/9270/9271/files/3d_max_models_chair_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/go_math_book_answers_fourth_grade.pdf
    • https://cdn.shopify.com/s/files/1/0438/5187/4466/files/action_movie_fx_star_wars.pdf
    • https://cdn.shopify.com/s/files/1/0434/1812/4445/files/tunetujotebevoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/folsom_prison_blues_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/8460/3801/files/pevigobisetixafobija.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_off00008557.bin
94203efc499aa16b6c523ae5c9f2dc6307167566ed3aabbbc8ac8c51f75ecc1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 5044 bytes
font_01_sfnt_off0000966e.bin
b7ef501548b81e648580594c872e3f51b4c69e0bbc4aab62e3a75ea2a375265f
pdf-font-stream PDF embedded font (sfnt) at offset 0x966E 10260 bytes