Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fc24222dd182c1…

MALICIOUS

PDF

46.7 KB Created: 2020-07-31 20:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 893df5b75c39f14de5c2847ae5088248 SHA-1: 752d95542d98637e8e3f2a68b6bc1e0cf81f66e4 SHA-256: 82fc24222dd182c1e723f28adb399e3a5f9a15069693392f4ac904de7215ddf7
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to a known malicious redirector, and a large number of links to other PDFs, likely for SEO manipulation. The document body and heuristics suggest a lure for cracked software, with a call-to-action button and password protection hints indicating a multi-stage download or archive delivery. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=antares+autotune+free+download+crack
    • http://files.severnwildlifecarvers.net/uploads/1/3/0/8/130874394/gasanonozosowal.pdf
    • http://files.williamsolmedo.com/uploads/1/3/1/4/131438038/pupema-duzufi.pdf
    • http://files.twinsmusicny.com/uploads/1/3/0/7/130738673/854993.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/butasuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/sozipabavof.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/calligraphy_letters_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/wuzexutisulidumitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/fasarovokixuva.pdf
    • https://cdn.shopify.com/s/files/1/0431/6977/5782/files/25171231593.pdf
    • https://cdn.shopify.com/s/files/1/0437/0189/5322/files/jalob.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/99039785941.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/43102403040.pdf
    • https://cdn.shopify.com/s/files/1/0437/6795/5610/files/97467906727.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c11.bin
fcc85fc64f3a2bb67629a60095674ee0333a599665388fd0527598957c63acbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C11 4992 bytes
font_01_sfnt_off00007d2a.bin
0087a156aa1a82d829aec04a2bfeb8b846f070dbe93aec3b0cfdef132667251c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2A 10112 bytes
font_02_sfnt_off00009fd8.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD8 4324 bytes

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