Malicious PDF — malware analysis report

Static analysis result for SHA-256 c803fc901e45edbd…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 16:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c55e91a5c5b7a3efe53ff631542c1cd3 SHA-1: fb63ad4521fe14d047e5dea1ad479ad465f63042 SHA-256: c803fc901e45edbd20d04ac1d23275392f42deb6b07ab283d373205c0c52c8af
152 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link pointing to a malicious domain, indicating a phishing or redirection attempt. The document body, though partially corrupted, includes the URL 'https://ttraff.com/pify?keyword=best+sports+live+streaming+apps+for+android', which is flagged as a malicious redirector. The presence of numerous links to external PDFs, many hosted on Shopify, suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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.com/pify?keyword=best+sports+live+streaming+apps+for+android
    • http://files.libbyes.com/uploads/1/3/1/4/131437724/8772752.pdf
    • http://files.akiineventos.com/uploads/1/3/0/8/130874676/2ed3dec84.pdf
    • http://zarufenu.debbiesangelsproductions.com/uploads/1/3/1/4/131453206/7729057.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13002849425.pdf
    • https://cdn.shopify.com/s/files/1/0463/0282/2557/files/folly_beach_surf_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/nodakel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/dynamic_class_instance_creation_in_swift_4.pdf
    • https://cdn.shopify.com/s/files/1/0462/8722/4993/files/76455166120.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/717242599.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/13433937212.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/78216512402.pdf
    • https://cdn.shopify.com/s/files/1/0428/5356/4583/files/avast_antivirus_2018_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/mijufikuzexupafewamir.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/relutipakuvalud.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/96391719920.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_off00006776.bin
35e3d241edc511dcb781a78f2f8d6d221216d0d1c04275bd9ab8c6f81def5be8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6776 5472 bytes
font_01_sfnt_off00007a01.bin
f583575810cd3941c4bda38c6e1bf478f2442bd0f1e38a13d2a864f43007158c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A01 10120 bytes

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