Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1d9a834ac0fa91b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 19:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7adc7fda522f547e913bc76a99e10e87 SHA-1: 71620533f3be68d669d2ae46d3d847abf1a431df SHA-256: f1d9a834ac0fa91b3ea026ce7ff71c5b3335a5c1196c3af52326179ce43c6bed
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=ssc.+nic.+in+gd+constable+result+2020+pdf`. It also exhibits a PDF link farm heuristic, with many links pointing to benign Shopify domains, likely for SEO manipulation. The document body, though heavily obfuscated, contains the same malicious redirector URL, suggesting the primary goal is to redirect the user to malicious content.

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.com/pify?keyword=ssc.+nic.+in+gd+constable+result+2020+pdf
    • http://xemewaz.limanawic.com/uploads/1/3/0/7/130740178/4604411.pdf
    • http://sirefex.hostmaster.ampabages.cat/uploads/1/3/2/6/132682883/1453721.pdf
    • http://files.leapfrogmountain.com/uploads/1/3/0/8/130874102/db14e7.pdf
    • http://files.momentsinthepark.com/uploads/1/3/0/7/130739369/jesanovuto_rewixafoto.pdf
    • http://niwise.ypflyinggroup.com/uploads/1/3/2/3/132303382/lujiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8234/1781/files/biomass_electricity_generation_plant.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/60905179850.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/oxford_advanced_learner_s_dictionary_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9791/5545/files/83906596647.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/xofebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7305/files/lisbon_subway_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/0863/8632/files/anemia_megaloblastica_embarazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/desinizunezewoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/gutijubedap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/xokojavatubariwup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/fumobepokupodim.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/double_bunk_bed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/cummins_jetsort_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/76610116215.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_off00005f64.bin
be3da3bc37b283cf9d9f3c7bff75dac12b29f3b7e2c68aec180ba7edb55fd1b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 5872 bytes
font_01_sfnt_off0000736d.bin
d4568d3ed3198f0eca9765b813a51b93e844d829478dd583b7dd2f391ac04103
pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 10416 bytes