Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c95bbb917fb7f0…

MALICIOUS

PDF

51.0 KB Created: 2020-08-10 09:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a454604ab56fa4b89609018d20326a5 SHA-1: d241b76a8c7afbdde2498392615f6502e6d1815e SHA-256: 80c95bbb917fb7f0b363f0f857f25242824820904b9945cf73a7016ca6305be1
162 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm designed to host other PDFs, and one critical link redirects to malicious infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.com/pify?keyword=manual+de+psicomagia+alejandro+jodorowsky+pdf+gratis, which is flagged as a malicious redirector. This suggests the document is part of a SEO poisoning or link farm scheme to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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
  • 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=manual+de+psicomagia+alejandro+jodorowsky+pdf+gratis
    • http://kovepow.wedorecyclinginsurance.com/uploads/1/3/0/9/130969060/f7223a597345ec.pdf
    • http://zivasu.mrsreyesclass.com/uploads/1/3/1/3/131380600/ef283.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/fesatixeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0434/7556/6749/files/exercice_anglais_present_simple_et_be_ing.pdf
    • http://jijebu.zli.people.ua.edu/uploads/1/3/0/8/130814297/mojilo-wusos-rurota.pdf
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/35687958016.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/revit_architecture_2016_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/logopazunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1463/6198/files/sadulikininigeraji.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/54633006026.pdf
    • https://cdn.shopify.com/s/files/1/0430/8988/7399/files/99285464416.pdf
    • https://cdn.shopify.com/s/files/1/0431/9327/0429/files/14434492505.pdf
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/21542385570.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/vubavigawogulowaniduxip.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005721.bin
6b33ff188d28154d6dbdbf812d80b7b44c2f9bc5adfe8bd5e5c9793c1c79fec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5721 6476 bytes
font_01_sfnt_off00006729.bin
054b57f5bfd0193d40e7949ba50c8978a33cde8541025e689ab1ca906b5e2173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6729 5816 bytes
font_02_sfnt_off00007b03.bin
2f27395f53361c97c1c173d19a1db90a1789530e1fe24679ef7de7b34509e99d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 2244 bytes
font_03_sfnt_off00008539.bin
5a9e10c245f731930aca22bae29fd3811c01a66155648c8621ef14db8860efcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8539 10408 bytes
font_04_sfnt_off0000a8fe.bin
149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8FE 16036 bytes

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