Malicious PDF — malware analysis report

Static analysis result for SHA-256 75394393be6f1b21…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 23:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 606a474762288c4cb2f8836f4ecfe875 SHA-1: 47d112b37fa9aadcab5cd23e0cade9ad3f5e588d SHA-256: 75394393be6f1b2174304262bb3a2f0cf08de2416e927d0b1977392dc3dad2da
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains the URL and text related to "potassic fertilizers", likely a lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.ru/pify?keyword=potassic+fertilizers+pdf
    • http://files.forgingdreams.com.au/uploads/1/3/0/7/130740625/fapelunowujix.pdf
    • http://jinevi.kimfairbournmusicstudio.com/uploads/1/3/1/1/131163635/nexawobosebe.pdf
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/wibofa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/1229603873.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/vibetemune.pdf
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/acupressure_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/74718730685.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/siganubamagepixowunize.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/abba_mamma_mia_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/paxulava.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/29184717245.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/jafavazivosibikubul.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/85559213153.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8239/files/69342380048.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068d6.bin
fd4b1d1a28480a10adbd28efda7f50fa6804d7fb470ff4b8e264dc22483ca545
pdf-font-stream PDF embedded font (sfnt) at offset 0x68D6 5200 bytes
font_01_sfnt_off00007a9f.bin
b64fbb4a7c9c8fc404c2e109550a1e07ae5babeca97cf96d40f9ff214644f960
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 10020 bytes