Malicious PDF — malware analysis report

Static analysis result for SHA-256 9038511e3ab2c99b…

MALICIOUS

PDF

47.6 KB Created: 2020-08-08 11:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ff944b323678bb4e20d5adf3e968ac SHA-1: dbc897f4719e9efee2aa92776f9dabd6edad7864 SHA-256: 9038511e3ab2c99bbd45a7d97a944849a0789be2490d01a627db5a41eee815f3
130 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body, though heavily obfuscated, contains the target URL and references to other PDFs, suggesting a link farm designed to obscure the malicious destination. The primary malicious URL is https://ttraff.cc/pify?keyword=analytical+method+validation+interview+questions+pdf, which redirects to a benign Shopify URL, likely as a camouflage step.

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.
  • 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
  • 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=analytical+method+validation+interview+questions+pdf
    • http://files.nataliecanderson.com/uploads/1/3/0/8/130813866/3c5e88a0d.pdf
    • http://files.irisrabines.com/uploads/1/3/1/4/131438348/vexuwetomojizu.pdf
    • http://files.rileytimmermusic.com/uploads/1/3/0/8/130814129/1979006.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/7212522724.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/luretamavaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/mebadavoxir.pdf
    • https://cdn.shopify.com/s/files/1/0434/7517/3528/files/13543506627.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/6466936208.pdf
    • https://cdn.shopify.com/s/files/1/0433/9836/5340/files/intro_to_the_design_and_analysis_of_algorithms_levitin.pdf
    • https://cdn.shopify.com/s/files/1/0434/4273/3208/files/ragabogawigozogexajexut.pdf
    • https://cdn.shopify.com/s/files/1/0428/7807/5036/files/43821950023.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/55995342795.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/factors_determining_price_elasticity_of_demand.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/femidifivadufagimub.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_off00007a74.bin
eda035f60c73b42c4bf86157d75f2c5f975c2424445c875ab8532792e5cd1b88
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 5764 bytes
font_01_sfnt_off00008e00.bin
449526fa02429e58648b1a136d2a67fec851510eaf475da428b4ab01d75da48d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E00 10292 bytes