Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d70fb899b59ccc…

MALICIOUS

PDF

45.3 KB Created: 2020-07-27 13:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88ad26c8d881b03b367b4783e9d29794 SHA-1: 89818dfb654a2506e99a4eff2304223b183fab40 SHA-256: 98d70fb899b59ccc023b3d2790ad0f2a091a800f3bcf5c21253668e71b4ac3eb
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that is disguised as a download for a popular app. The link leads to 'ttraff.ru', which is known malicious infrastructure. The document also contains a large number of embedded links, many pointing to Shopify domains, likely part of a link farm to improve SEO for malicious content. The presence of a download button lure further supports the malicious intent.

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=jio+cinema+app++for+android+free
    • http://files.logancountycore.com/uploads/1/3/1/3/131398117/2876669.pdf
    • http://files.printmedia.nl/uploads/1/3/1/6/131606798/diwogizometeweteru.pdf
    • http://files.bethpumaconsulting.com/uploads/1/3/1/4/131453252/batonotiliferodas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/97463143916.pdf
    • https://cdn.shopify.com/s/files/1/0433/9679/2478/files/wotexitanobajamigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisurerikemamezawapux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5061/4429/files/dijov.pdf
    • https://cdn.shopify.com/s/files/1/0432/8528/2980/files/950747150.pdf
    • https://cdn.shopify.com/s/files/1/0430/2402/3715/files/6675558165.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/tuvobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/tekutivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/86642708484.pdf
    • https://cdn.shopify.com/s/files/1/0432/3360/7842/files/37401021189.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/39419207737.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/nijupobisinorake.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/pitejizopemikuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/parabigawejolokigulo.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://cdn.shopify.com/s/files/1/0433/0687/7080/files/gaxedisur

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074ab.bin
f38fd717059610504452830ca4a5eec649a821c034bb4ea9261086d46b432f37
pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 4788 bytes
font_01_sfnt_off000084c3.bin
27edff7dae761f05f61e54843e93b1ad353c8bd862d62b9bad0d7e2a67bd748c
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C3 10212 bytes