Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d53b5459b4c23bf…

MALICIOUS

PDF

51.5 KB Created: 2020-08-14 01:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 546c2cf10268fc0d44e81e3fb8082057 SHA-1: dd401c92181b3528ede058c266923a0dbb10803d SHA-256: 2d53b5459b4c23bf7765ae07a65cba6ad14870071ef36d9c574e23effce9a214
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=scratch+3.+0+free++for+windows+7`. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of many other PDF links, some hosted on Shopify, indicates a link farm strategy to improve search engine visibility for malicious content.

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.ru/pify?keyword=scratch+3.+0+free++for+windows+7
    • http://files.my-tbl.com/uploads/1/3/1/3/131380390/komovexazed_kebobigegel_ganodi.pdf
    • http://files.owius.org/uploads/1/3/0/7/130740374/kugajudujuz.pdf
    • http://files.ishairimmer.com/uploads/1/3/1/8/131856290/738984.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/15036306670.pdf
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/valedictory_speech_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/kekijubiji.pdf
    • https://cdn.shopify.com/s/files/1/0435/5974/7745/files/sidefidakijanij.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/sports_vocabulary_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/lawesixozuganajeje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/vunikatewujojaloxupes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/gutubedizodomononefap.pdf
    • https://cdn.shopify.com/s/files/1/0434/4869/6993/files/axis_and_allies_1940_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/badunujinudukewurokon.pdf
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/beyond_meat_ipo_performance.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058a8.bin
02daa5edc13110647fffeb01328f5cd5e6355e7ce7e4967d1cb83abff42e5da6
pdf-font-stream PDF embedded font (sfnt) at offset 0x58A8 3028 bytes
font_01_sfnt_off00006363.bin
8927d98052ed589d014ed20880d36f51dc64680f70c639242fabdd801097b516
pdf-font-stream PDF embedded font (sfnt) at offset 0x6363 5692 bytes
font_02_sfnt_off000076c5.bin
c826afd5e5a63347f007c9e996462aff83034285a4ad5644e67f552e1eed9473
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C5 5804 bytes
font_03_sfnt_off0000855c.bin
6674e9d980f99281647a821244449a2b09cad98daa5c35356b6a382445f71d2c
pdf-font-stream PDF embedded font (sfnt) at offset 0x855C 10952 bytes
font_04_sfnt_off0000ab21.bin
22c3ba09e8cf1325a54e3cd3bb657ff99244ae793782a272ee343ac892b84c01
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB21 16168 bytes