Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9e4de8d3de84cb…

MALICIOUS

PDF

43.4 KB Created: 2020-08-21 15:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a935fee1fbfcdb804e86ded05b6dbd09 SHA-1: eaacc48c0957ff3187132b5fdf4e6d29f397daf9 SHA-256: 9a9e4de8d3de84cbc47f53fd45234a99dec130f9d50f3d21814539376e5fb2d6
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=super+mario++for+pc'. This URL is presented within the document body, alongside numerous other links to PDF files hosted on Shopify, forming a link farm. The presence of a 'download button' heuristic further suggests a lure to trick users into clicking the malicious link. The file is likely a social engineering lure to redirect users to malicious infrastructure.

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.ru/pify?keyword=super+mario++for+pc
    • http://files.yellowroseevents.co/uploads/1/3/0/7/130740056/9911817.pdf
    • http://files.kappafoundationwi.org/uploads/1/3/0/7/130739147/gixas.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/mimamojisen.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdf
    • https://cdn.shopify.com/s/files/1/0434/2507/1256/files/ledojidefupibefobugazuzu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/cormyr_the_tearing_of_the_weave.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/biodata_format_for_muslim_marriage.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/95408002384.pdf
    • https://cdn.shopify.com/s/files/1/0432/5264/6050/files/buxokabu.pdf
    • https://cdn.shopify.com/s/files/1/0447/1917/7882/files/receptive_bilingualism.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/livesowovuguzagulagebem.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/24149902950.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7256/files/15453506626.pdf
    • https://cdn.shopify.com/s/files/1/0432/3416/4893/files/66831647879.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8742/files/attestation_honneur_hbergement.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_off00006ac0.bin
3065b09185bae91ab59ddae79c4b8944accdafac34d927dbd071db5df9e71dae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 5056 bytes
font_01_sfnt_off00007bd8.bin
2af92616b224d3522ba36a2c8632488d787a1029b565679ef31ed931a13e01de
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD8 11592 bytes