Malicious PDF — malware analysis report

Static analysis result for SHA-256 4553f5f7ad6b1cba…

MALICIOUS

PDF

42.0 KB Created: 2020-08-23 02:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53d8975c1ab55ecae1e421dd3e77a3ce SHA-1: 7d3f296e15bf783ee2b8842acaedfb9093b29693 SHA-256: 4553f5f7ad6b1cbad0ee2cd890033550f2624cc466bbb1cae3302f1683ea965e
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm for SEO poisoning or traffic redirection. The document body, though partially corrupted, contains a URL that appears to be a lure for a 'Kaspersky security center 11 implementation guide', which redirects to the malicious ttraff.ru domain. No scripts were extracted from this sample.

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=kaspersky+security+center+11+implementation+guide
    • http://movomuwop.designwithyouinmind.org/uploads/1/3/0/8/130874575/98384a7f7931b.pdf
    • http://womax.latorreholidays.com/uploads/1/3/1/4/131453574/8496882.pdf
    • http://jopub.soundslikesilence.net/uploads/1/3/1/4/131438025/bivujet_samigabotib_wowitewepifub.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/namoger.pdf
    • https://cdn.shopify.com/s/files/1/0434/3391/8616/files/92397277742.pdf
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/android_activity_background_transparent.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/nukolej.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/eduqas_examiners_report_english_language.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/zezekinesosetezelezujid.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/xosodorujanis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/benim_hocam_matematik_tyt.pdf
    • https://cdn.shopify.com/s/files/1/0429/0061/9423/files/gufipovuvom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexivopagutufaxusezonav.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_off0000677e.bin
ebaa263e2e1b200f7cd42c581916caa36917c3f85b331b181defb43e19785732
pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 5580 bytes
font_01_sfnt_off00007a72.bin
d2c9a8208cc95ae033db3bb6c79d296b8f2df991e558dc7e5d26efdc2f7362d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A72 9508 bytes