Malicious PDF — malware analysis report

Static analysis result for SHA-256 da36030b77ceb8ef…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 15:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beb4c5a4cdf74f9917ae444daca51629 SHA-1: 3fd74344620289739b668b0e4ad853ffb5f4b85f SHA-256: da36030b77ceb8effb398ebb02066b4d31462914964942745c3ed66042dafb5c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious content. The document body, though obfuscated, contains text related to job applications and includes the primary malicious URL. The presence of numerous PDF links suggests a SEO poisoning or link farm tactic to distribute the malicious payload.

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.cc/wb?keyword=example%20of%20job%20application%20letter%20in%20tanzania%20pdf
    • http://files.hotelbythepark.com/uploads/1/3/0/7/130775195/movagilab-kixaso-medorodafugaxu.pdf
    • http://files.flvetbehavior.com/uploads/1/3/1/4/131454151/zitut.pdf
    • http://files.prettycardsandmore.com/uploads/1/3/2/3/132302892/josenolufepu_xodanakiza_kepinilebigoma.pdf
    • http://moduvoro.aloenottingham.com/uploads/1/3/1/3/131380942/rubinulobowale.pdf
    • http://files.eternalimpactmissions.org/uploads/1/3/1/0/131070207/d4ca2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0428/5395/7799/files/50494896794.pdf
    • https://cdn.shopify.com/s/files/1/0434/4840/2081/files/11141711814.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/75351489744.pdf
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/10655443406.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/gedix.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/acronis_true_image_2018_bootable_usb.pdf
    • https://cdn.shopify.com/s/files/1/0437/8404/4705/files/arduino_programming_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2560/files/archaic_words_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/barth_commentary_on_romans.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8242/files/airport_time_capsule_user_manual.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_off00006430.bin
972c8e2af8c32d6a4c04fb3138c0e5ac1860860ee52471c49c5d23e46afa35f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6430 5416 bytes
font_01_sfnt_off00007694.bin
2a07452fbe5a833b950b413f4e35f5d5cb06f74e9aace8b73627963da3cd8d76
pdf-font-stream PDF embedded font (sfnt) at offset 0x7694 10060 bytes