Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb9c8599d01b731…

MALICIOUS

PDF

47.9 KB Created: 2020-08-30 01:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6bae247e09ff675c0085bfa3beb0d4c SHA-1: b65366894ef474545a8012c4bf86a1be3e9db597 SHA-256: bcb9c8599d01b73121cd0755c0d4a90dd3107c224602a8d10e7b6543f1d96ce8
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'facebook ad targeting' and the malicious URL. The presence of numerous Shopify links suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=the+complete+guide+to+facebook+ad+targeting
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/1247728221.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/79516545124.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/65302024533.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/31774634009.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/72589688106.pdf
    • https://cdn.shopify.com/s/files/1/0454/2601/6424/files/97448239722.pdf
    • https://cdn.shopify.com/s/files/1/0437/4619/7653/files/95031682706.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/bedatavetejavigarix.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/docx_file_opener.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6071/files/rixubawuruworemusorulu.pdf
    • https://cdn.shopify.com/s/files/1/0449/6916/4968/files/bubble_bobble_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/59188915980.pdf
    • https://cdn.shopify.com/s/files/1/0450/3748/6238/files/dialogismo_e_polifonia.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/mekizuzolidokobejoxisogu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9086/0437/files/nidanu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e34.bin
1eacb5461ac8381aaa34a7a0bc80af6697367b3285a07e3e44fc5989a5c858b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E34 5424 bytes
font_01_sfnt_off00008079.bin
d68630832dd1d25804068877541490bdc5b3e1db81c2abba4f4a9eb10804939a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8079 10580 bytes
font_02_sfnt_off0000a49d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA49D 4324 bytes