Malicious PDF — malware analysis report

Static analysis result for SHA-256 1787a93a2d95039a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-01 10:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2fbd7069e12b64345189cd53186dd20 SHA-1: bdd5872dd2ca82d893bb3986c38cb155073ab92b SHA-256: 1787a93a2d95039a506b5fe4ece1c05247085053bc4561a9295e8e1a5e797e67
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, constituting a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=cognitive+dissonance+podcast', is identified as a malicious redirector. The file's structure and the presence of numerous external links suggest an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

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.ru/pify?keyword=cognitive+dissonance+podcast
    • http://files.medaryville.net/uploads/1/3/1/1/131164442/5d33b.pdf
    • http://files.onestrength.com.au/uploads/1/3/1/0/131070469/ranaxalijumoza-xokata-xulawudiper-difivosivi.pdf
    • http://files.wilderblubordercollies.com/uploads/1/3/2/6/132681307/rakopagobufep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/59931866301.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/junotijadonulenudofexut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/46010637365.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/lopisoboxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/58234055693.pdf
    • https://cdn.shopify.com/s/files/1/0438/0763/7661/files/xatugapivig.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/lurumuloxijazagul.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/17593184632.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/metofopox.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004beb.bin
6a8c9ad7cf6b07f54ff1f01958f9cae9e7ef9a5bad321c64439d747038ebeec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BEB 6408 bytes
font_01_sfnt_off00005bb6.bin
d598eebcd106a36f3aeed4b0cb9f3a71cc505ee61eccb70460aafd4b8c43eb75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB6 5080 bytes
font_02_sfnt_off00006d1c.bin
b82fd9d189291988f4a0715f99b5bc0616a6343c2fe81d5ac96c27366203e64a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1C 10344 bytes
font_03_sfnt_off0000909e.bin
c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x909E 16144 bytes

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