Malicious PDF — malware analysis report

Static analysis result for SHA-256 37644b5af7bcba01…

MALICIOUS

PDF

42.5 KB Created: 2020-09-02 23:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d1963990659ec069f09e38a4affae29 SHA-1: eb15b3366cc2457dea2267c909742418ca78d071 SHA-256: 37644b5af7bcba010bbd48811732eb38ae145f5036ec2276e6b3b9026c74b4f4
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One URL, 'https://ttraff.club/wix?keyword=candy+crush+jelly+for+pc+free', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

Heuristics 3

  • 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.
  • 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.club/wix?keyword=candy+crush+jelly+for+pc+free
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/big_data_hadoop_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/rak_nie_jest_chorob_andreas_moritz_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/90802771820.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/32160350996.pdf
    • https://static.usrfiles.com/ugd/4479ed_d29381fbec734d0bb30f74ede07a00c4.pdf
    • https://static.usrfiles.com/ugd/de60da_6837f912cabf4a79a3a4e36c0c74fd0b.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/abortus_spontan.pdf
    • https://cdn.shopify.com/s/files/1/0429/3446/8774/files/formation_of_red_blood_cells_vitamins.pdf
    • https://cdn.shopify.com/s/files/1/0439/7416/4638/files/chevrolet_sonic_ltz_2015_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.pdf
    • https://cdn.shopify.com/s/files/1/0435/4116/8283/files/14243175527.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/jasekojekeza.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7696/files/6305175149.pdf
    • https://cdn.shopify.com/s/files/1/0449/3400/4891/files/79597856483.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_off0000681b.bin
e440d69391e5eceaa7ca4d0c1d2940cd1a271d1d671e37b9885a67f68c2f1f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681B 5328 bytes
font_01_sfnt_off00007a40.bin
0a3f58db8bdc7f9162a5d7cadf485966574ecdfb909d8fd13b35a10941175a72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A40 10196 bytes

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