Malicious PDF — malware analysis report

Static analysis result for SHA-256 44809ba6908ed03d…

MALICIOUS

PDF

48.7 KB Created: 2020-08-23 00:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c72fc755d67443f97bec9809553bc719 SHA-1: 7f6d08deb34589eee37d79af15c805e847524be4 SHA-256: 44809ba6908ed03db0ca4338ad682ef49d3f9a06d434d034a249a772eb126b5c
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a free resume template. This indicates a social engineering attempt to direct the user to malicious content. The document body and numerous embedded URLs further support this, with many linking to PDF files hosted on Shopify, likely part of a link farm to improve SEO for malicious content. No scripts were extracted, but the primary attack vector is the malicious URL.

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=free+resume+template+word+2010
    • http://zawelij.helpinghandsquiltguild.com/uploads/1/3/1/3/131381241/bowatamutenipizog.pdf
    • http://files.rochin.com/uploads/1/3/1/4/131413678/gadutivu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7994/8695/files/vegumowesuzenelidutet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2525/files/zogejowuxawi.pdf
    • https://cdn.shopify.com/s/files/1/0439/4981/8024/files/74111572658.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/dimupixotibetowew.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/75089612302.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/zogatiweruvin.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1376/files/big_data_analytics_with_spark_mohammed_guller_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7435/5351/files/58996872137.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57355052908.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45366335679.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/tokesezun.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073b6.bin
fffa0bc9ecc4db584c89ee8ba5b7fda306183c9797e22bed7fdfb766312af51e
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B6 5208 bytes
font_01_sfnt_off00008581.bin
b56091458f20b3a74cf8e0f2b5d8a3db14a8a109dd23eee87ddfbc22840b11f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8581 10120 bytes
font_02_sfnt_off0000a813.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA813 4324 bytes